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1
Penney, Randy W. "Comparative morphology of preextrusion larvae of the North Atlantic sharp-beaked red fishes, Sebastes mentella and Sebastes fasciatus (Pisces: Scorpaenidae)." Canadian Journal of Zoology 63, no. 5 (May 1, 1985): 1181–88. http://dx.doi.org/10.1139/z85-176.
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Preextrusion larvae of the ovoviviparous scorpaenid fishes, Sebastes mentella and Sebastes fasciatus, identified by the gas-bladder musculature characteristics of the parent, are described. Morphometrics, meristics, and pigmentation characteristics were recorded for late-stage preextrusion larvae taken from adult females on St. Pierre Bank, an area immediately south of and adjacent to the island of Newfoundland, Canada. The morphology of preextrusion larvae of S. mentella, in comparison with S. fasciatus, is described in detail for the first time. Univariate statistics were calculated and the utility of each of several morphometric, meristic, and pigmentation variables as a potential species identification criterion was evaluated. Discriminant analysis correctly classified up to 95% of larvae examined. The potential of the discriminant function in species identification for planktonic larvae is discussed.
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Mura*, Dr Shambhu Nath Sing. "A Geospatial Morphometric Analysis of Kulbera and Daurighara River Basins in Western Part of Purulia District of West Bengal, India." International Journal of Engineering and Advanced Technology 10, no. 3 (February 28, 2021): 143–54. http://dx.doi.org/10.35940/ijeat.c2247.0210321.
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Morphometric analysis is used to understand the hydrological process and assessment of hydrological characteristics of surface water basin. In the present paper, an attempt has been made to study the detail morphometric characteristics of Kulbera and Daurighara river basin, which are tributaries of Subarnarekha River in Purulia district, West Bengal. For detailed study, SRTM data has been used for preparing digital elevation model (DEM), and Geographic Information System (GIS) has been used for the analysis of linear, areal, and relief aspects of the basins. Watershed boundary, flow accumulation, flow length, stream ordering have been prepared by using ILWIS 3.0. Different thematic maps i.e. elevation, geology, drainage density, slope and longitudinal profiles of river channels have been prepared by using QGIS 3.0 and MapInfo 10.0 GIS software. More than 58 morphometric parameters of all aspects of the basins have been computed. On the basis of morphometric analysis it has been argued that the erosional development has progressed well beyond maturity and that the drainage development is controlled by lithology. Besides,it can be concluded that this study will also be very useful for rain water harvesting planning and watershed management.
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Curcic, B. P. M., T. Radja, R. N. Dimitrijevic, S. B. Curcic, Nina Curcic, S. E. Makarov, and B. S. Ilic. "Microchthonius kasteli n. sp. (Chthoniidae, Pseudoscorpiones): A new cave false scorpion from Croatia (Dalmatia)." Archives of Biological Sciences 66, no. 1 (2014): 437–43. http://dx.doi.org/10.2298/abs1401437c.
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A new blind false scorpion, Microchthonius kasteli n. sp., from the Micoletova Jama Pit, Rudine, nr. Kastel, Dalmatia, has been described. The new pseudoscorpion is different from all other congeners. It is probable that this new taxon is the remain of an old tropical soil fauna, which now inhabits the subtropical area of the Mediterranean seaside. Morphometric ratios, figures, and linear measurements of the new species are presented in detail.
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Delgado, Cristina, M. Helena Novais, Saul Blanco, and Salomé F.P. de Almeida. "Examination and comparison of Fragilaria candidagilae sp. nov. with type material of Fragilaria recapitellata, F. capucina, F. perminuta, F. intermedia and F. neointermedia (Fragilariales, Bacillariophyceae)." Phytotaxa 231, no. 1 (October 15, 2015): 1. http://dx.doi.org/10.11646/phytotaxa.231.1.1.
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Fragilaria candidagilae Almeida, C. Delgado, Novais & S. Blanco is a new araphid diatom species, described from samples collected in central and southern Portugal (SW Europe). Fragilaria candidagilae has linear-lanceolate valves with strongly capitate apices, without spines, and alternate punctate striae. This taxon presents siliceous plaques on the valve mantle edge, two apical pore fields in the poles and siliceous depositions on the outer areolar openings in the form of rounded floating disks. The morphology of the new diatom species is documented by light and scanning electron micrographs and discussed in detail, including a morphological comparison with the type material of similar taxa such as Fragilaria recapitellata, F. capucina, F. intermedia, F. neointermedia and F. perminuta to confirm it as a new species. Statistical comparison of morphometric characters and valve shape analysis were based on at least 20 valves. Ecological notes were also included. Considering morphology and morphometry, together F. candidagilae is clearly different from other species.
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Sah, SK, H. Pant, and YX Wang. "Morphometric Analysis of Common Bile Duct: A Cadaveric Study." Journal of Biomedical Research & Environmental Sciences 2, no. 2 (February 23, 2021): 064–68. http://dx.doi.org/10.37871/jbres1190.
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Introduction: Though human beings look similar in their general anatomical appearances but during the investigation of a particular structure in detail, it is surprising how frequently we meet one sort or another type of variation. Literature reports that accurate dimensions of CBD are debatable. Therefore, determination of a spontaneous abnormality or atypical variation is important and reference range plays a significant role to classify the normal or abnormal duct. Materials and Methods: A total of thirty (30) cadavers were dissected at MGM Medical College Mumbai, India from Jan 2012 to March 2013 for anatomical features of the common bile duct-like their size, variations in the course and termination. Results: The length of the common bile duct varies 35.19 mm to 62.43 mm with Mean ± SD 46.92 ± 7.91 mm and diameter varied between 3.65 mm to 10.31 mm with mean value 6.50 ± 1.77. The correlation between length and diameter of common bile duct is statistically insignificant (p = 0.243) Conclusion: We established a reference range for the CBD length and diameter. Thus, the exact knowledge of the anatomy of the common bile duct is significant for successful hepato-biliary surgery and biliary pathology.
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Curcic, B. P. M., T. Radja, R. N. Dimitrijevic, S. B. Curcic, Nina Curcic, and S. E. Makarov. "A new cave pseudoscorpion from Dalmatia - Microchthonius tragurion n. sp. (Chthoniidae, Pseudoscorpiones)." Archives of Biological Sciences 65, no. 3 (2013): 1253–59. http://dx.doi.org/10.2298/abs1303253c.
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A new eyeless pseudoscorpion, Microchthonius tragurion n. sp., from a cave in Blizna Donja (near Trogir), from the Jama kod Gomilje Pit, Dalmatia, is described. This new false scorpion differs from all other congeners. There exists a probability that this new taxon is a relict of a tropical fauna incorporating the once northern and tropical area, now representing the subtropical part of the Mediterranean. Morphometric ratios, figures and linear measurements of the new taxon are presented in detail.
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LIN, CHIEN-TING, and HSUAN-CHING HO. "Morphological and molecular identification of leptocephali of Taiwanese duckbill conger, Gavialiceps taiwanensis (Chen & Weng, 1967) (Family Congridae)." Zootaxa 4454, no. 1 (July 31, 2018): 215. http://dx.doi.org/10.11646/zootaxa.4454.1.17.
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The leptocephali of the Taiwanese duckbill conger are described in detail for the first time based on specimens collected from near the type locality. Morphological and molecular features are employed to compare the leptocephali, juveniles and adults. The morphology of leptocephali can be divided into three stages, with clear metamorphosis of the jaw structure and morphometric proportions. Detailed description and comparison of each leptocephalic stage, juveniles and adults, and the ontogenetic changes of leptocephali are provided.
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Chaudhary, A., and H. S. Singh. "Description of two new species of the genus Thaparocleidus Jain, 1952 (Monogenea, Dactylogyridae) from freshwater fish in India: morphological and molecular phylogenetic evidence." Journal of Helminthology 87, no. 2 (March 28, 2012): 160–73. http://dx.doi.org/10.1017/s0022149x12000119.
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AbstractThe present paper describes the taxonomy of two new monogeneans, namely, Thaparocleidus longiphallus sp. n. and T. siloniansis sp. n., based on morphological, morphometric and molecular biological analysis, collected from the fish Wallago attu (Bloch & Schn.) and Silonia silondia (Ham.), respectively, at Meerut, UP, India. Genetic characterization of the two new species is based on sequence analyses of the rDNA 28S gene using neighbour-joining and maximum-parsimony techniques. These methods are congruent in depicting T. longiphallus sp. n. and T. siloniansis sp. n. as closely related species, but distinct from each other and forming a subclade with other species of the genus Thaparocleidus Jain, 1952. Secondary-structure models of the large subunit rDNA of the two species were also predicted using a combined comparative and thermodynamic approach. Molecular morphometric and phylogenetic relationships of the isolates of the Thaparocleidus species are discussed in detail.
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Nikolic, Dusan, Stefan Skoric, Gorcin Cvijanovic, Milica Jacimovic, Vesna Djikanovic, and Branislav Mickovic. "Morphometric and meristic characteristics of the Amur sleeper (Perccottus glenii) from the Danube River drainage channel." Archives of Biological Sciences, no. 00 (2021): 31. http://dx.doi.org/10.2298/abs210413031n.
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In recent decades, the Amur sleeper (Perccottus glenii) is one of the most impressive east-to-west invaders of European inland waters, but there are insufficient data on its biology in the countries it has entered. Specimens of two sets of samples from November 2015 (n=25) and October 2016 (n=39) were caught in the Danube River channel near Veliko Gradiste (Serbia) by electrofishing. Thirty morphometric and eight meristic characteristics of the collected fish were measured with the aim of describing the general body shape in more detail using the ?point-topoint? method. This is the first attempt to obtain morphometric and meristic characteristics of Amur sleeper caught in Serbia. The results revealed a relatively low variability in the morphometric and meristic characters of the studied population. When compared to other studies, there was a great variability of the studied characteristics between geographically distant European populations that inhabit different water body types. Female fish had more robust bodies compared to males of the same length, while males had longer pectoral, anal and dorsal fins. Additionally, 2+ individuals had more robust heads and jaws, as well as longer anterior parts of the body compared to 1+ individuals of the same size.
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FOX, C. A. "A MORPHOMETRIC SYSTEM FOR DESCRIBING THE MICROMORPHOLOGY OF ORGANIC SOILS AND ORGANIC LAYERS: FURTHER QUANTITATIVE AND QUALITATIVE CHARACTERIZATION." Canadian Journal of Soil Science 65, no. 4 (November 1, 1985): 695–706. http://dx.doi.org/10.4141/cjss85-075.
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At the first level of detail of description of a thin section, qualitative information about the occurrence of the fabric zones (regions of distinct morphology) and their basic morphologic units (the various components) were recorded with symbols in a fabric description symbol. At a second level of detail of description, Level II, additional quantitative and qualitative micromorphological information can be included with coding into the fabric description symbol according to the following. general format:[Formula: see text]At Level II description, quantitative information on the areal proportions of the fabric zones and basic morphologic units are recorded with indices in the fabric unit; qualitative data on the kind of boundary relationships between adjacent fabric zones, and quantitative data on the areal occurrence of the fabric zones are recorded with the modifier expression; and both quantitative and qualitative information on the occurrence, morphology, and arrangement of specific features observed in the fabric zones are recorded with the fabric unit descriptor. Depending on the requirements of a study, more than one fabric unit descriptor can be written for each fabric zone that is delineated in a thin section. The procedure for writing fabric description symbols at a Level II detail of description of a thin section is presented and applied to the characterization of the micromorphology of an organic layer from a Typic Mesisol. Key words: Micromorphology, descriptive method, organic soils, characterization
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Self-Trail, Jean M., David K. Watkins, James J. Pospichal, and Ellen L. Seefelt. "Evolution and taxonomy of the Paleogene calcareous nannofossil genus Hornibrookina." Micropaleontology 68, no. 1 (2022): 85–113. http://dx.doi.org/10.47894/mpal.68.1.04.
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The genus Hornibrookina consists of enigmatic calcareous nannofossils that first appeared shortly after the K-Pg mass extinction. Due to their relative paucity in most published sections, specimens of this genus have not been previously studied in detail and their paleobiogeographic preferences and evolutionary history have been poorly understood. Biostratigraphic and morphometric analyses of Hornibrookina specimens from outcrops and cores from the Atlantic Ocean, the North Sea, the Southern Ocean, the Indian Ocean, North America, South America, Africa, and New Zealand resulted in a comprehensive and detailed documentation of this group of calcareous nannofossils. Biostratigraphic ranges for each species are refined and a hypothetical evolutionary lineage for this genus is proposed. Two new species (Hornibrookina gracila and Hornibrookina indistincta), two new combinations (Hornibrookina elegans and Hornibrookina australis arca) and one new subspecies (Hornibrookina australis australis) are described. Morphometric analyses prove that Hornibrookina edwardsii and Hornibrookina teuriensis are distinctly different species with biostratigraphically useful ranges. Hornibrookina apellanizii is shown to be invalid.
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Cardoso, Pedro Henrique, Luiz Menini Neto, Nádia Silvia Somavilla, and Marcelo Trovó. "A morphometric approach and recircumscription of the Stachytarpheta longispicata complex (Verbenaceae)." European Journal of Taxonomy 833 (July 28, 2022): 12–45. http://dx.doi.org/10.5852/ejt.2022.833.1881.
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The Stachytarpheta longispicata complex is a group of seven accepted infraspecific taxa endemic to the Brazilian Cerrado, defined by its pedicellate flowers with salmon or dark red corollas. Due to the great morphological variation and very brief original descriptions, these taxa have controversial circumscriptions. We evaluated the morphological variation through the morphometric analysis of 11 natural populations in addition to nomenclatural types to assess the current infraspecific circumscriptions and clarify the limits of these taxa. A set of 36 continuous vegetative and reproductive characters was measured for each of the 115 specimens sampled, encompassing the morphological variability in the group and its geographic distribution. A compiled data matrix formed the basis for the multivariate analysis (UPGMA, PCA, and DA). Our results recovered five consistent groups corresponding to the four subspecies, and all three recognised varieties treated in the same morphological group. Quantitative and qualitative characters not previously studied in detail are important to delimit the five groups. A taxonomic rearrangement is proposed for the complex, circumscribing five distinct species: Stachytarpheta brevibracteata, S. longipedicellata, S. longispicata, S. minasensis, and S. ratteri. The taxonomic treatment includes four new combinations and names at new rank, two new synonyms, and one lectotype. Descriptions, an identification key, geographical distribution map, illustrations, and provisional conservation assessments are also provided.
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Kibria, Golam Mohammad. "The morphometric measurements of the gross structural changes of mitral valve in valvular stenosis with or without regurgitation." Faridpur Medical College Journal 9, no. 1 (June 10, 2015): 7–11. http://dx.doi.org/10.3329/fmcj.v9i1.23615.
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Rheumatic mitral stenosis is still a cardiac problem in developing countries. Reconstructive and replacement surgery of the diseased valves are often needed. Most of the studies on stenotic mitral valves are echocardiographic one. Morphometric measurements of the stenotic mitral valve and comparison with that in the normal mitral valve is done in this study. Thirty seven hearts of normal adult-male unclaimed dead-bodies from the mortuary of Forensic Medicine, Dhaka Medical College, Dhaka; and twelve surgically excised stenotic mitral valves of the adult-male cardiac patients from the National Institute of Cardiovascular Diseases, Dhaka, Bangladesh were studied in fresh condition. The detail morphometric findings were compared between two groups. Though the total annular circumference was similar in both groups, yet the effective orifice area reduced significantly in stenotic valves. The anterior leaflet-area was increased, but the posterior leaflet-area was decreased in the stenotic valves. The thickness of the stenotic leaflets and chordae tendineae were increased compared to that in normal valves. The knowledge of the pathological changes of the valves would help to understand the exact pathophysiological mechanisms involved in the cardiac valve diseases.Faridpur Med. Coll. J. 2014;9(1): 7-11
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Wilson, Benjamin Carl, José Antonio Ramos, and Richard Anthony Peters. "Intraspecific variation in behaviour and ecology in a territorial agamid, Ctenophorus fionni." Australian Journal of Zoology 68, no. 2 (2020): 85. http://dx.doi.org/10.1071/zo20091.
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Intraspecific variation as a way to explore factors affecting the evolution of species traits in natural environments is well documented, and also important in the context of preserving biodiversity. In this study, we investigated the extent of behavioural, morphological and ecological variation in the peninsula dragon (Ctenophorus fionni), an endemic Australian agamid that displays extensive variation in colour across three allopatric populations. The aims of the study were to quantify variation across the different populations in terms of the environment, morphometric characteristics and behaviour. We found population level differences in habitat structure and encounter rates. Adult body size of C. fionni, as well as a range of morphometric traits, differed between populations, as well as the frequency of social interactions, which appears to be related to population density and abundance. Analysis of communicative signals showed differences between the southern and central populations, which appear consistent with variations in response to environmental differences between study sites. The findings of the present study, coupled with previous work examining colour variation in this species, show that the three populations of C. fionni have likely undergone substantial differentiation, and would make an interesting study system to explore trait variation in more detail.
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Georgiou, Nikos, Xenophon Dimas, Elias Fakiris, Dimitris Christodoulou, Maria Geraga, Despina Koutsoumpa, Kalliopi Baika, Pari Kalamara, George Ferentinos, and George Papatheodorou. "A Multidisciplinary Approach for the Mapping, Automatic Detection and Morphometric Analysis of Ancient Submerged Coastal Installations: The Case Study of the Ancient Aegina Harbour Complex." Remote Sensing 13, no. 21 (November 6, 2021): 4462. http://dx.doi.org/10.3390/rs13214462.
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The documentation of underwater cultural heritage (UCH) is the basis for sustainable maritime development including its protection, preservation, and incorporation in coastal zone management plans. In this study, we present a multidisciplinary, non-intrusive downscale approach for the documentation of UCH implemented on the coastal area of Aegina Island, Greece, where a unique submerged harbour complex is preserved. This approach succeeded in obtaining information that serves both geomorphological and archaeological purposes in a time- and cost-effective way, while obtaining information of centimeters to millimeters scale. The geomorphology of the area was mapped in detail through marine geophysical means while ancient submerged conical rubble structures and breakwaters were documented using automatic seafloor segmentation techniques, revealing previously unknown sites of archaeological interest. The structures’ parameters were extracted from the acoustic data to analyze their morphometry, while photogrammetry was realized using a Remotely Operated Vehicle to expose their micro-structure. The spatial distribution of the structures revealed the construction of a well-planned harbour complex with multiple passages and different possible functionalities. Finally, through the structures’ morphometric analysis (geometry and terrain statistical parameters) their preservation status was revealed, demonstrating the anthropogenic impact on the submerged ancient structures due to the modern harbor activity.
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Tajika, Amane, Naoki Morimoto, Ryoji Wani, and Christian Klug. "Intraspecific variation in cephalopod conchs changes during ontogeny: perspectives from three-dimensional morphometry of Nautilus pompilius." Paleobiology 44, no. 1 (January 24, 2018): 118–30. http://dx.doi.org/10.1017/pab.2017.36.
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AbstractIntraspecific variation of organisms is of great importance to correctly carry out taxonomic work, which is a prerequisite for key disciplines in paleontology such as community paleoecology, biostratigraphy, and biogeography. However, intraspecific variation is rarely studied in ectocochleate cephalopods (ammonoids and nautiloids), for which an excessive number of taxa was established during the past centuries. Because intraspecific variation of fossilized organisms suffers from various biases (time averaging and taphonomy), an extant example is needed for actualistic comparison. We applied 3D morphometry to 93 specimens of Nautilus pompilius from three different geographic populations. This data set was used to examine the intraspecific variation throughout ontogeny in detail. Although there are slight differences between the populations as well as some measurement biases, a common pattern of intraspecific variation appears to be present. High variation in morphometric variables appears early in ontogeny and then decreases gradually in the following ontogenetic stages. Subsequently, the variation shows an increase again before maturity until a sharp increase or decrease occurs toward the end of ontogeny. Comparison with intraspecific variation of ammonoids and belemnites illustrated that some groups have ontogenetic patterns of intraspecific variation that are similar to that of N. pompilius. This implies that the abovementioned ontogenetic pattern of intraspecific variation might be common in some major cephalopod clades.
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Şenoğlu, Mehmet, Fuat Özkan, and Mustafa Çelik. "Placement of C-7 intralaminar screws: a quantitative anatomical and morphometric evaluation." Journal of Neurosurgery: Spine 16, no. 5 (May 2012): 509–12. http://dx.doi.org/10.3171/2012.1.spine111048.
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Object Crossing laminar screws at C-7 have been recently described as a method for the fixation of C-7. In this study the authors measured locations on axial CT scans to determine the feasibility of placing a screw in the C-7 lamina, and they evaluated the reliability of the surface of the dorsal arch of C-7 as a landmark for determining the optimal site of screw entry. Methods A total of 207 axial CT scans of C-7 spines were evaluated, and 4 critical measurements were determined for screw entry points, trajectories, and lengths for placement of intralaminar screws. Results The mean width of the right C-7 lamina was 5.9 mm (range 4.2–9.3 mm). The mean width of the left C-7 lamina was 6.0 mm (range 4.2–10.2 mm). The laminar width was too small (< 5.5 mm) in 37.7% of cases to accommodate a 3.5-mm diameter screw, given the desire for at least 1 mm of play on each side of the screw. Conclusions These measurements provide guidelines for operating on the posterior aspect of C-7 and enhance the confidence of the surgeon. Viewing the anatomy of the C-7 laminae in detail through preoperative CT scanning can greatly assist the surgeon in choosing the fixation method. The width of the C-7 lamina is sufficient for intralaminar screw placement in more than 60% of patients.
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Mukherjee, Monalisa Malik. "Morphometric and Meristic Analysis of Sillaginopsis panijus Along with Seasonal Variation from Rupnarayan River, West Bengal, India." Bioscience Biotechnology Research Communications 14, no. 4 (December 25, 2021): 1737–45. http://dx.doi.org/10.21786/bbrc/14.4.53.
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Present study is a first-time report of flathead Sillago, Sillaginopsis panijus (Hamilton, 1822), from Rupnarayan River of West Bengal. Seasonal sampling performed from January 2019- February 2020 by collection of water sample and fish sample in the morning time 5.00 A.M. – 8.00 A.M. A total of 116 specimens of Sillaginopsis panijus (Hamilton, 1822) were collected from four different sampling stations of Rupnarayan river (22.23°N 88.03°E to 22.40°N 87.36°E), West Bengal, India. Present work is a morphometric and meristic data analysis has been provided in detail. Total 23 morphometric characters and 13 meristic characters were analyzed. Morphological characteristics of the species were present to confirm the occurrence and distribution of Sillaginopsis panijus (Hamilton, 1822) along the riverine water of Rupnarayan. The physico-chemical parameters of water have been measured such as temperature of water, dissolved oxygen, pH and salinity. The statistical analysis of multivariate test with post-Hoc analysis and correlation were established with the abundance of S. panijus (Hamilton, 1822) in relation to water parameters. The result shows the dissolved oxygen, temperature, pH and salinity played a most important role in the distribution of S. panijus (Hamilton, 1822). The result shows a statistically significant difference in distribution of fish species, F (12, 8) =18.86, p<0.0005; Wilk’s Λ=0.001, partial η2=0.966. Present study certainly provides the baseline information of Sillaginopsis panijus (Hamilton, 1822) from the Rupnarayan river of West Bengal, India. This record of Sillaginopsis panijus (Hamilton, 1822) may assist the fishery scientist, researchers, policy planners and conservationists to develop sustainable fishery management. Therefore, this study was considered as a first step on morphometric characters for its development and documenting the extension of the distribution and ecological changes in its natural habitat which helps to conserve this species abundance in this area and prevent overexploitation.
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Алтанболд, Э., Х. Уламбадрах, Я. Гансүх, Г. Бямбабаяр, Г. Түвшин, Г. Юмчмаа, and Э. Амаасүрэн. "Тэрхийн Цагаан нуурын хотгорын морфодинамик хөгжил." Geographical Issues 22, no. 1 (March 9, 2022): 4–19. http://dx.doi.org/10.22353/.v22i1.528.
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Data on the origin and morphology of lake depressions in Mongolia is poor and only 2 percent of total studies. The morphological patterns of the lake depressions caused by volcanic activity have not been well studied in Mongolia. The morphometric indicators of Khorgo volcanic lava plateau, its effect on the morphological changes of the lake depression, and the relationship between them are not studied in detail. The Khorgo volcanic lava is analyzed to clarify how it formed and compare it to the origin of the neighbouring Terkhiin Tsagaan Lake depression. This paper is defined the effect of Khorgo volcanic lava plateau on the origin of the Terkhiin Tsagaan Lake depression, based on morphometric analysis, remote sensing and geological mapping. Also study is checked by field measurements as identifying fault lengths, locations and morphology. Upon the Khorgo volcano activation, the valley of the Terkh River was dammed by a lava plateau. Lava damming formed the Terkhiin Tsagaan Lake depression, blocking the Terkh River valley. Another evidence is the age of the lava plateau and lake sediment. Terkhiin Tsagaan Lake area was three times larger than it is now (9000 years ago), comparing the terraces on the shoreline of the lake. The lake water outflows via the Suman River. The Suman River diversion has created a large canyon along fault. Changes in the water volume of Terkhiin Tsagaan Lake and the erosion of the Suman Gol canyon are inversely related. This study is concerned that the effect of the youngest volcano in Central Asia is achieved a role in the development of lake depression, and presents a basis for integrating morphometric analysis to define the main phases of volcanic activity and lake depression evolution. Current lake area and volume is under influences of climate and environmental changes and human activities.
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Gaafar, Ali, Monier Abd El-Ghani, Azza El Hadidy, and Ethar Hussein. "A MULTIVARIATE MORPHOMETRIC ANALYSIS OF THE GENUS LOTUS L., 1753 (FABACEAE, LOTEAE) FROM EGYPT." Bulletin of the Iraq Natural History Museum 16, no. 4 (December 20, 2021): 509–33. http://dx.doi.org/10.26842/binhm.7.2021.16.4.0509.
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This study aims at examining and confirming the patterns of phenetic relationships and the levels of variations within and among the species of Lotus L., 1753 in Egypt by using morphometric analysis techniques. We have evaluated 24 morphological characters from about 300 herbarium specimens representing 19 species of Lotus that are currently recognized. Based on numerical analyses of macromorphological characters (cluster analysis, principal coordinate analysis and principal component analysis), 19 species of Lotus were recognized from Egypt. These species were clustered in six species-specific groups: (I) Lotus halophilus Boiss. & Spruner, L. angustissimus L., L. glinoides Delile and L. schimperi Steud. ex Boiss., (II) Lotus glaber Mill. and L. palustris Willd., (III) Lotus polyphyllos E.D. Clarke, L. creticus L. and L. cytisoides L., (IV) Lotus gebelia Vent., L. lanuginosus Vent. and L. arenarius Brot., (V) Lotus edulis L., L. tetragonolobus L. and L. conjugatus L. and (VI) Lotus ornithopodioides L., L. peregrinus L., L. arabicus L. and L. hebranicus Hochst. ex Brand. As a result of this study, we proposed that some characters, not previously examined in detail, showed significant characters in species delimitation: pod length, seed dimensions, features of upper and lower leaflets, calyx, length of corolla, length of style, numbers of flowers and ovules.
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Ковалев, S. Kovalev, Грязнов, Dmitry Griaznov, Булынина, and Olga Bulynina. "The Comparison of Morphometric Data with Clinical, Microbiological and Echocardiographic Criteria of Left Parts Infective Endocarditis." Journal of New Medical Technologies 21, no. 2 (August 13, 2014): 72–76. http://dx.doi.org/10.12737/5003.
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To determine the diagnostic validity of histological study and the feasibility of using this type of data for the correction of treatment tactics, the comparison of the data obtained on the basis of morphometric analysis of remote intracardiac structures in patients operated on for valve infective endocarditis of left parts of the heart, with the main clinical, microbiological and echocardiographic characteristics of the disease was performed in this research. Data were studied from 62 patients with left part of infective endocarditis in the period from 2010 to 2013. This study showed that the morphological and histological criteria allow more detail to describe the notion «active endocarditis» and to choose the most adequate treatment strategy. In the control group of patients the severity of morphological changes according to most of the criteria corresponds to the severity of clinical manifestations that determine the severity of the condition and the forecast in infective endocarditis. It is necessary to use a comprehensive approach, including histological and morphological criteria of infective endocarditis.
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Carabella, Miccadei, Paglia, and Sciarra. "Post-Wildfire Landslide Hazard Assessment: The Case of The 2017 Montagna Del Morrone Fire (Central Apennines, Italy)." Geosciences 9, no. 4 (April 16, 2019): 175. http://dx.doi.org/10.3390/geosciences9040175.
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This work focused on a post-wildfire landslide hazard assessment, applied to the 2017 Montagna del Morrone fire. This wildfire increased the possibility of landslides triggering, as confirmed by the occurrence of a debris flow, triggered by an intense, short duration rainfall event in August 2018. The study area was investigated through a detailed analysis incorporating morphometric analysis of the topography and hydrography and geomorphological field mapping, followed by the landslide hazard assessment. In detail, the analysis was performed following a heuristic or expert-based approach, integrated using GIS technology. This approach led to the identification of five instability factors. These factors were analyzed for the construction of thematic maps. Hence, each factor was evaluated by assigning appropriate expert-based ranks and weights and combined in a geomorphology-based matrix, that defines four landslide hazard classes (low, moderate, high, and very high). Moreover, the morphometric analysis allowed us to recognize basins prone to debris flows, which, in relevant literature, are those that show a Melton ratio of >0.6 and a watershed length of <2.7 km. Finally, all the collected data were mapped through a cartographic and weighted overlay process in order to realize a new zonation of landslide hazard for the study area, which can be used in civil protection warning systems for the occurrence of landslides in mountainous forested environments.
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Karpova, Irina Yuryevna, Vyacheslav Vladimirovich Parshikov, Natalia Nikolaevna Prodanets, Tatyana Ivanovna Solovieva, Evgenia Dmitrievna Pyatova, Darya Vasilievna Molchanova, and Anastasia Alexandrovna Bebenina. "Clinical and experimental substantiation of the effect of hypoxia on the wall of the small and large intestine in newborns." Journal of Experimental and Clinical Surgery 11, no. 4 (December 9, 2018): 268–74. http://dx.doi.org/10.18499/2070-478x-2018-11-4-268-274.
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Based on the analysis of morphological and morphometric data, the clinical and experimental results of the effect of hypoxia on the wall of the small and large intestine in newborns are presented. The clinical part is based on the study of 58 case histories of patients with necrotizing enterocolitis, which the operating material (resected sections of the small intestine, large intestine) was studied in detail. The experimental work included the modeling of chronic hypobaric hypoxia in different trimesters of pregnancy in 4 groups of white rats (24 females). The offspring was taken out of the experiment at 4-5 days after birth, followed by collection of the small and large intestine areas to study histoarchitectonics. It is proved that hypoxia affects the number of newborn offspring, its weight. The small intestine is most vulnerable to the effect of this factor. Analysis of the morphological and morphometric picture of the operating and experimental material convincingly proves that under the influence of hypoxia the destruction of the intestinal mucosa occurs and the growth of the connective tissue component in the muscle layer occurs.
Changes from the microcirculation of blood and lymph provoke the development of pre-ulcerative, ulcerative defects and the formation of necrosis. Disturbance of the drainage function promotes the spread of destruction in the intestinal wall.
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Hohl, Leandro dos Santos Lima, Mariana Fiuza de Castro Loguercio, Fernando Lencastre Sicuro, José Duarte de Barros-Filho, and Oscar Rocha-Barbosa. "Body and skull morphometric variations between two shovel-headed species of Amphisbaenia (Reptilia: Squamata) with morphofunctional inferences on burrowing." PeerJ 5 (July 18, 2017): e3581. http://dx.doi.org/10.7717/peerj.3581.
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Background Morphological descriptions comparing Leposternon microcephalum and L. scutigerum have been made previously. However, these taxa lack a formal quantitative morphological characterization, and comparative studies suggest that morphology and burrowing performance are be related. The excavatory movements of L. microcephalum have been described in detail. However, there is a lack of studies comparing locomotor patterns and/or performance among different amphisbaenids sharing the same skull shape. This paper presents the first study of comparative morphometric variations between two closely related amphisbaenid species, L. microcephalum and L. scutigerum, with functional inferences on fossorial locomotion efficiency. Methods Inter-specific morphometric variations were verified through statistical analyses of body and cranial measures of L. microcephalum and L. scutigerum specimens. Their burrowing activity was assessed through X-ray videofluoroscopy and then compared. The influence of morphological variation on the speed of digging was tested among Leposternon individuals. Results Leposternon microcephalum and L. scutigerum are morphometrically distinct species. The first is shorter and robust with a wider head while the other is more elongated and slim with a narrower head. They share the same excavatory movements. The animals analyzed reached relatively high speeds, but individuals with narrower skulls dug faster. A negative correlation between the speed and the width of skull was determined, but not with total length or diameter of the body. Discussion The morphometric differences between L. microcephalum and L. scutigerum are in accord with morphological variations previously described. Since these species performed the same excavation pattern, we may infer that closely related amphisbaenids with the same skull type would exhibit the same excavatory pattern. The negative correlation between head width and excavation speed is also observed in others fossorial squamates. The robustness of the skull is also related to compression force in L. microcephalum. Individuals with wider heads are stronger. Thus, we suggest trade-offs between excavation speed and compression force during burrowing in this species.
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Güven, A., and T. Öztürk. "Morphological features of three species of Phyllodistomum (Trematoda: Gorgoderidae) from some marine fishes in the southern Black Sea." Marine Biological Journal 7, no. 1 (March 22, 2022): 46–54. http://dx.doi.org/10.21072/mbj.2022.07.1.04.
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Three species of the genus Phyllodistomum Braun, 1899 are identified infecting marine teleost fishes from Sinop coast (southern Black Sea, Turkey). Those are Phyllodistomum acceptum from Parablennius sanguinolentus; Phyllodistomum crenilabri from Symphodus tinca and Symphodus ocellatus; and Phyllodistomum sp. from Gobius cruentatus. Standard parasitological investigation methods were implemented, and morphological diagnostic features of these species were studied in detail under both light microscope and scanning electron microscope. The measurement data of all morphological diagnostics are provided; photomicrographs of each part of the parasites are presented. Infection prevalence and intensity values are given, as well as morphometric data for each parasite species. This research is the first on Phyllodistomum sp. presence in Gobius cruentatus. Moreover, this study is the first one, in which the tegumental surface of P. acceptum and P. crenilabri was examined by scanning electron microscopy.
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Cho, Kyuhee, Chailinn Park, and Ruth Böttger-Schnack. "Taxonomy of three species of the genus Spinoncaea (Copepoda, Oncaeidae) in the North Pacific Ocean with focus on morphological variability." ZooKeys 1043 (June 15, 2021): 147–91. http://dx.doi.org/10.3897/zookeys.1043.64438.
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Three species of Spinoncaea Böttger-Schnack, 2003 are newly recorded in three locations of the equatorial and temperate Pacific Ocean collected by using a net of 60 μm mesh size. For all three species, morphological characters and patterns of ornamentation were analyzed in detail and illustrations of both sexes, also including form variants of the females, are provided. For the first time, information about the variability of various continuous (morphometric) characters are given, such as the spine lengths on the rami of the swimming legs or the proportions of urosomites. The complementary morphological descriptions of the Pacific specimens focus on similarities or modifications of characters as compared to earlier descriptions of these species from the type locality and various other localities. For S. ivlevi (Shmeleva, 1966), originally but insufficiently described from the Adriatic Sea, the Pacific material is similar in most aspects to the comprehensive redescription of the species from the Red Sea and from the type locality, except for a difference in the morphometry of the distal endopod segment on the antenna, which is discussed here. For S. tenuis Böttger-Schnack, 2003, and S. humesi Böttger-Schnack, 2003, the Pacific material mostly coincides with the characteristic features as described in the original account from the Red Sea. For all three species, differences and/or additions in ornamentation details were found in Pacific specimens (e.g., on the intercoxal sclerite of the first swimming leg or on the genital somite of the male) and females with aberrant morphology were detected. Genetic analyses based on 12S srRNA revealed for two species, S. ivlevi and S. humesi, little or no differences in genetic sequences between Pacific specimens and those recorded from the Mediterranean Sea, thus demonstrating that specimens from both locations are conspecific. For S. tenuis, for which no comparable genetic data are available, 12S srRNA amplification was unsuccessful as was the amplification of mitochondrial COI (barcoding) for all three species. The applicability of using COI amplification for barcoding of oncaeid copepods is discussed.
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Hoffmann, Benjamin D., Alan N. Andersen, and Xiang Zhang. "Taxonomic confusion of two tramp ant species: Iridomyrmex anceps and Ochetellus glaber are really species complexes." Current Zoology 57, no. 5 (October 1, 2011): 662–67. http://dx.doi.org/10.1093/czoolo/57.5.662.
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Abstract Many invasive invertebrates belong to unresolved species complexes, and have a history of misidentification and inappropriate management. Here we detail confusion surrounding the taxonomy and identification of two dolichoderine ant species, Iridomyrmex anceps Roger and Ochetellus glaber Mayr, which are commonly cited in the literature as having been spread widely by human commerce. We provide morphometric data and images strongly suggesting that these two “species” are instead complexes of species that are likely native to many regions where they are purportedly introduced. We take particular interest in the status of species referred to as I. anceps and O. glaber in China, as this is the most northerly distribution of both genera. We conclude by suggesting that many identifications of both species are likely to be unreliable, and we recommend against any management action aimed at controlling these species under the assumption that they are exotic.
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Miranda, Bruno Henrique V., and Daniel Silva Fernandes. "Morphological Variation ofSordellina punctata(Peters, 1880) with Notes on the Phylogenetic Position of the Genus within the Family Dipsadidae (Serpentes)." International Journal of Zoology 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/827820.
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Sordellina punctata(Peters, 1880) is a poorly known species from Brazil that, until recently, had an uncertain phylogenetic position. Sixty-one specimens ofSordellina punctatawere examined, representing different localities encompassing the known geographic distribution of this taxon. Eight skulls and five hemipenes were prepared and described in detail and data on scale variation and color pattern as well as morphometric data were analyzed. The skull bones described, as well as the hemipenis ofS. punctata, were compared to available data in the literature referred to members of the tribe Echinanterini and related taxa.Sordellina punctatapresents an average snout-vent length of 31.5 cm for males and 40.2 for females and has an average of 149 ventral scales in males and 157 in females. The data presented here reinforce the necessity of a greater amount of osteological descriptive studies, especially of members of the tribe Echinanterini, in order to evaluate the recently proposed hypothesis of relationship ofS. punctataand these taxa.
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Butler, Aodhán D., Michael Streng, Lars E. Holmer, and Loren E. Babcock. "Exceptionally preserved Mickwitzia from the Indian Springs Lagerstätte (Cambrian Stage 3), Nevada." Journal of Paleontology 89, no. 6 (November 2015): 933–55. http://dx.doi.org/10.1017/jpa.2016.8.
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AbstractExceptionally preserved specimens of the Cambrian stem-group brachiopod Mickwitzia occidens Walcott, 1908 are described in detail from the Indian Springs Lagerstätte in Nevada, USA. Shell structure and preserved mantle setae from these specimens reveal a variable diagenetic (taphonomic) history and provide insight into the phylogenetic position of mickwitziids. Morphologic and morphometric comparison to M. monilifera (Linnarsson, 1869) from Sweden and M. muralensis Walcott, 1913 from British Columbia, Canada reveals clear species-level distinctions. Scanning electron microscopic analysis allows revision of the generic diagnosis. The Mickwitzia shell is characterized by the presence of inwardly pointing phosphatic cones and tangential setae-bearing tubes. The inwardly pointing cone structures are not consistent with setal bearing structures as previously thought, but rather represent endopunctae-like structures. Acrotretid-like shell structures and shell-penetrating setae in M. occidens strengthen the previously proposed close relationship between stem-group brachiopods and tommotiids, a group of small shelly fossils.
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PFINGSTL, TOBIAS, SYLVIA SCHÄFFER, ERNST EBERMANN, and GUENTHER KRISPER. "Differentiation between two epilittoral species, Scutovertex arenocolus spec. nov. and Scutovertex pilosetosus Polderman (Acari: Oribatida) from different European coasts." Zootaxa 2153, no. 1 (July 9, 2009): 35–54. http://dx.doi.org/10.11646/zootaxa.2153.1.3.
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Scutovertex arenocolus spec. nov. living in the sandy shore of the Baltic coast is described. Additionally, a closely related species, S. pilosetosus, occurring in marsh habitats of the North Sea coast, is redescribed in detail. Both species show a similar habitus. Scutovertex arenocolus differs from S. pilosetosus in the length of body, cusps and notogastral setae, in the ridge on mentum as well as in a different exochorion structure of the eggs. A morphometric analysis of 14 morphological characters confirmed distinctly shorter cusps and notogastral setae in S. arenocolus. Additionally, a principal component analysis performed with 17 morphological traits provided a clear separation of these two species and of S. minutus. The results of these analyses lead to the conclusion that earlier reports of S. minutus in the coastal zone of the Atlantic, the Baltic and the North Sea should be assigned to the one or the other of these two littoral species.
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Tyulkova, E. G. "Phytoindication and lichenmonitoring of Gomel city urbanized landscape state and adjacent territories." Ecology and Noospherology 27, no. 3-4 (September 15, 2016): 77–88. http://dx.doi.org/10.15421/031616.
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In Belarus Republic the increase tendency in size and number of emissions per square kilometer of the territory from stationary sources is observed in case of decrease in emissions from mobile sources in recent years. Among separate ingredients across the Gomel region growth of sulfur dioxide in emissions from engineering procedures stationary sources is noted that in total is a negative factor for growth and development of region vegetation. The vegetable cover which is characterized by lack of an opportunity to avoid technogenic impact in comparison with other indicators is the most indicative and quickly reacting indicator of industrial enterprises activities influence. Features of sheet device of wood plants morphometry of plants adaptation strategy element in the conditions of technogenic impact and in habitats various on soil wealth and productivity were studied by many researchers in detail. Besides, the lichenindikation belongs to one of effective environment pollution indication methods. However, comparative assessment of the various biological parameters indicator importance and reasons of the most informative characteristics complex for determination of territorial complexes transformation under the industrial influence production is most urgent for extent assessment of ecosystems transformation under the technogenic impact influence. Proceeding from the aforesaid, the work purpose consists in determination of such informative bioindicator indicators as a sheet plate morphometry and a lichensmonitoring for vegetation technogenic change assessment in impact industrial enterprises zone of Gomel city. As research objects were chosen a drooping birch Betula pendula, a white poplar Populus deltoides and a maple acutifoliate Acer platanoides. These trees are one of the most widespread and the researched territories which are often found on. Collection of plant material was carried out during the vegetative period (July, August) 2015– 2016. From each pilot tree (3–5 on each site) from height of 1,5–2 m from the surface of the soil broke 20–25 intact most developed leaves at which determined length, width of a sheet plate. For carrying out a lichenmonitoring used a method of visual assessment and a method of linear crossings. As a result of the comparative analysis of most widespread representatives of wood plants sheet plate length and width it was established that the morphometry of drooping birch leaves Betula pendula and maple acutifoliate Acer platanoides and their standard deviation from average value increases in process of decrease industrial enterprises level technogenic influence in 2015–2016, except for white poplar Populus deltoides leaf length in 2015–2016, and also a standard deviation of drooping birch Betula pendula leaves morphometry and white poplar Populus deltoides in 2015 in the northern industrial zone. The sheet device of inspection zones is characterized by larger sizes in comparison with industrial zones. The dispersive analysis results demonstrate that sheet plate wood plants morphometric parameters statistically authentically differ in case of various size technogenic pollution action on their forming and development that confirms a use this criterion possibility for atmospheric air pollution indication. As a result of a lichenmonitoring growth of bushy lichens in zones with lower technogenic loading and more considerable projective covering the crustose lichens on trees bark from more intensive technogenic influence territory is established. Perhaps effectively to use the integrated approach considering the sheet device morphometric analysis and a lichenmonitoring for vegetable cover indication of technogenic influence.
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Mkrtchian, Alexander. "FEATURES OF ECOLOGICAL GEOMORPHOMETRY AS A PROSPECTIVE FIELD OF STUDY, ITS MAIN CONCEPTS AND METHODS." PROBLEMS OF GEOMORPHOLOGY AND PALEOGEOGRAPHY OF THE UKRANIAN CARPATHIANS AND ADJACENT AREAS, no. 11(01) (January 13, 2021): 140–55. http://dx.doi.org/10.30970/gpc.2020.1.3205.
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Abstract. The main concepts and methods of ecological geomorphometry as a research field aimed at studying relationships between terrain morphometric characteristics and ecological factors and processes are reviewed in the paper. The progress in this research field has been conditioned by the propagation of high-resolution digital elevation models in free access and of methods of their digital analysis, namely: the calculation of derivative quantitative characteristics (attributes and indices) of terrain and the statistical models of analyzing the relationships between the latter and the ecological properties and factors (those relevant for a certain ecological subject). A peculiar feature of ecological approach to regarding terrain (its morphology) is subjectcentrism (that is, regarding it from a point of view of a certain subject). The subject of ecological relationships can be living entities (populations, species, communities) as well as a human, social entities, economy and its branches. Three main concepts of ecological geomorphometry are put forward: terrain attributes (relatively simple quantitative characteristics of terrain form that characterize its geometry and some elementary physical processes); topographic indices (quantitative surrogates for some complex physical or biophysical processes of ecological significance); morphotops (spatial units that are distinguished by terrain morphology, using criteria of ecological homogeneity relevant from a viewpoint of a certain ecological subject). Morphotops can be distinguished with different level of detail (and, as a result, with different characteristic dimensions), relative to the study aim, to the geographic features of the area, and to the available data and the methods of their analysis. While morphotops are distinguished with strictly defined quantitative morphometric parameters (terrain attributes, topographic indices), this enables using formalized methods with their advantages of reproducibility and possibility of automatizing. In our studies aimed at morphotop mapping for a small area in the hilly terrain of Davydiv range near Lviv and for a larger area in the central part of Ukrainian Carpathians, morphotops delineation was based on topographic indices that characterize insolation level (solar radiation incidence on terrain elements of different aspect and slope values), lateral redistribution of water on slopes and redistribution of solid matter by washout on slopes. Morphotops were distinguished with cluster analysis method, which allows to distinguish natural groupings of data in the attribute space. Presetting different number of clusters to be distinguished, morphotopes can be distinguished with different levels of detail, larger number of clusters corresponding to more homogenous morphotops with smaller characteristic sizes. Key words: ecological geomorphology, ecological geomorphometry, morphotops, terrain attributes, topographic indices.
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Filonenko, Yurii, and Roman Fedorets. "Modern military relief forms of Chernihiv Region – their types, morphological and morphometric features." Physical Geography and Geomorphology 96, no. 4-6 (2019): 36–42. http://dx.doi.org/10.17721/phgg.2019.4-6.04.
Full textAbstract:
Investigation into relief forms which arose on the territory of Chernihiv region in the 2nd half of the 20th and the beginning of the 21st centuries from anthropogenic activities for military purposes were conducted in all districts of the region. During the work field research was actively used as well as encyclopaedic and Internet materials were applied. The morphological and morphometric features of denudation and accumulative forms of military relief which appear as a result of military operations and exercises, construction of warehouses and equipment of their security zones, erection of defence objects and arrangement of mass graves (fraternal graves) and so on were studied in detail. In particular, defensive fighting positions (including tank and cannon), trenches, breastworks, blindages, dugouts, traces of grenades from shells and bombs together with areas of proving grounds, training centres, airfields and monuments of various sizes and shapes were explored. The research results suggest that most objects which can be classified as military relief forms of World War II naturally occur in places where major battles in strategically important directions of offensive of both opposing sides took place. The findings also revealed that many military relief forms of the WWII period have undergone significant deformation as a result of development of scree formation processes, plane erosion, eolian processes, influence of various representatives of biota as well as agricultural and forestry human activities. In addition, in the southern (forest-steppe) part of the region such relief forms occur considerably less frequently than in the northern (Polissia). This is most likely due to greater plowing of the territory and, consequently, greater anthropogenic load of the agrarian type, which relatively quickly levelled military relief forms in the postwar period. A special place among all the objects of military relief of Chernihiv region of the WWII period is occupied by the museum-memorial complex of guerrilla glory “Lisograd”. It is located in the middle of forest near the village of Jeline in Snovsk district. Here, on the site of the former guerrilla camp, defensive fighting positions, trenches and residential (dugouts) structures of those times were reconstructed in the 2000s. The largest modern military relief forms within the territory of Chernihiv region are the military proving ground in Honcharivske (Chernihiv district), the Desna training center with its own proving ground near Desna (Kozelets district) as well as functioning and defunct military airfields and air bases near Horodnia, Dobrianka, in the village of Maliiky (Chernihiv district), Chernihiv, Pryluky and Nizhyn.
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Ivanik, O., L. Tustanovska, D. Kravchenko, and K. Hadiatska. "ADAPTATION OF THE METHOD OF STRUCTURAL-MORPHOMETRIC ANALYSIS TO THE GIS ENVIRONMENT FOR PALEOGEOMORPHOLOGICAL STUDIES OF THE KANIV DNIEPER." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 2 (89) (2020): 6–11. http://dx.doi.org/10.17721/1728-2713.89.01.
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Kaniv Dnieper area is a unique region that has evolved through the Neogene-Quaternary phase. The application of geological and geomorphological methods, remote sensing data and GIS made it possible to identify the genetic relationship between the processes of geomorphogenesis and tectogenesis within the Kaniv Dnieper region, to build a number of geological and geomorphological models. The methodology of structural-morphometric analysis is adapted to the GIS and the process of cartometric constructions is automated. An algorithm for creating order maps of valleys and basal surfaces has been developed. Basal surfaces are complex surfaces that combine local erosion bases and express the total movements of the earth's crust over various time intervals. A study of the morphogenesis and tectogenesis of the territory of the Kaniv Dnieper region showed that the neotectonic movements within this region had a differentiated character. Five stages of tectonic evolution were determined during the Neogene-Quaternary stage of its development. Hypsometry of basic surfaces of five orders was investigated, and a detailed comparison of the morphology of single-order surfaces has been made. On the basis of the obtained data on the nature of the surfaces, absolute and relative elevations, the nature of the isobasite pattern, the geomorphological structure of each stage has been analyzed in detail. The conducted studies revealed a regular relationship between the relief and tectonics.
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Grifoni, Emanuela, Letizia Bonizzoni, Marco Gargano, Jacopo Melada, Nicola Ludwig, Silvia Bruni, and Ilaria Mignani. "Hyper-dimensional Visualization of Cultural Heritage: A Novel Multi-analytical Approach on 3D Pomological Models in the Collection of the University of Milan." Journal on Computing and Cultural Heritage 15, no. 2 (June 30, 2022): 1–15. http://dx.doi.org/10.1145/3477398.
Full textAbstract:
Digital close-range photogrammetry allows us to acquire high-fidelity tridimensional models useful to document cultural heritage objects with an impressive level of detail. In addition, this technique carries a strong analytical potentiality, able to gain improved knowledge of cultural objects and their preservation conditions. This project is focused on a comprehensive diagnostic survey using 3D multispectral modeling, high-resolution digital radiography, pulsed thermography, XRF, FT-IR, and FORS spectroscopies to document and characterize from a conservative point of view the poly-material objects that belong to the “Garnier Valletti” pomological collection—a unique collection from both scientific and artistic points of view. The analytical integration of imaging techniques, 3D modeling, and spectroscopic techniques provides information from the surface, sub-surface, and innermost layers of the object, respectively, capturing both accurate morphometric, spectral, and compositional data. The article presents the results obtained on typical poly-material and multilayered objects of this collection for which the combination of the considered techniques provided important data to the technical knowledge of the realization highlighting a particular predictive ability from a conservative point of view.
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MICHAT, MARIANO C. "Description of the second- and third-instar larvae of Hydrovatus crassulus Sharp, 1882 (Coleoptera: Dytiscidae: Hydrovatini)." Zootaxa 4999, no. 5 (July 14, 2021): 469–78. http://dx.doi.org/10.11646/zootaxa.4999.5.5.
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The second- and third-instar larvae of the diving-beetle species Hydrovatus crassulus Sharp, 1882 are described and illustrated, including detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages, legs, last abdominal segment and urogomphi. Larvae of this species lack the parietal pore PAo, the premental seta LA3 and the urogomphal seta UR8, and have the sensillum MN2 shaped as a short hair-like seta and the ventral surface of the abdominal segments II–V sclerotized. All these characteristics are shared with the other species of Hydrovatus Motschulsky, 1853 known in detail (H. caraibus Sharp, 1882) and therefore are considered diagnostic for the genus. Hydrovatus crassulus also characterizes by the presence of a small galea, which reinforces the hypothesis that this structure is part of the ancestral condition of Hydrovatus. Larvae of H. crassulus differ from those of H. caraibus in having a smaller size, a smaller ratio U/LAS, and a larger ratio U1/U2, and also in the presence (in most cases) of a secondary seta on the anteroventral surface of femur.
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DWORSCHAK, PETER C. "On the identities of Callianassa bouvieri Nobili, 1904, C. maldivensis Borradaile, 1904, and C. gravieri Nobili, 1905 (Crustacea: Decapoda: Callianassidae): a morphometric approach." Zootaxa 3149, no. 1 (January 4, 2012): 39. http://dx.doi.org/10.11646/zootaxa.3149.1.2.
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Recent samplings of callianassid shrimp from various habitats, together with the study of type specimens, show that Cal-lianassa gravieri Nobili, 1905 is a junior synonym of Callianassa bouvieri Nobili, 1904. Callianassa maldivensis Borra-daile, 1904, which had been synonymised with the latter, is a separate species. Morphometric analysis of more than 250specimens of these shrimps, which are assigned here to the genus Paratrypaea Komai & Tachikawa, 2008, show that P.bouvieri males and females have unequal chelipeds, whereas P. maldivensis has males with unequal chelipeds and femaleswith equal chelipeds. In addition, both species differ by the presence/absence and size of a median spine on the posteriortelson border. Male P. bouvieri and P. maldivensis are superficially similar but can be differentiated based on numerouscharacters of the major chelipeds, which are illustrated here in detail. The two species occur in different habitats, P. bou-vieri in the intertidal, often near mangroves, P. maldivensis usually sublittoraly near patchy corals. The importance of size and sex when comparing callianassid species is discussed.
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BUCK, MATTHIAS, TYLER P. COBB, JULIE K. STAHLHUT, and ROBERT H. HANNER. "Unravelling cryptic species diversity in eastern Nearctic paper wasps, Polistes (Fuscopolistes), using male genitalia, morphometrics and DNA barcoding, with descriptions of two new species (Hymenoptera: Vespidae)." Zootaxa 3502, no. 1 (October 1, 2012): 1. http://dx.doi.org/10.11646/zootaxa.3502.1.1.
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A study of male genitalia, morphometric head measurements and DNA barcoding revealed three overlooked species in eastern Nearctic Polistes (Fuscopolistes), two of which are described here: P. (F.) hirsuticornis Buck, sp. nov. and P. (F.) parametricus Buck, sp. nov. Polistes carolina of authors is a complex of two or three species. Type studies also uncovered new synonymies: P. rubiginosus Lepeletier, 1836, sp. restit. (=P. perplexus Cresson, 1872, syn. nov.; P. generosus Cresson, 1872, syn. nov.); P. nigripennis (De Geer, 1773) is removed from synonymy with P. carolina (Linnaeus, 1767) and tentatively synonymized with P. canadensis (Linnaeus, 1758) (=Vespa nigripennis De Geer, 1773, syn. nov.). A revised key to eastern Nearctic Fuscopolistes Richards, 1973 is presented. The male genitalia of eastern Nearctic species are illustrated in detail for the first time, and a preliminary genitalic key is presented. DNA barcoding revealed strongly divergent genetic lineages in three species besides "P. carolina". A so-called 'barcoding gap' was not detected, thereby ruling out species delimitation through divergence thresholds. Indirect evidence suggests that the newly described species may be obligate social parasites.
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Aguiar, Alexandre P. "Revision of the Australian Stephanidae (Hymenoptera)." Invertebrate Systematics 15, no. 6 (2001): 763. http://dx.doi.org/10.1071/it00006.
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The Australian Stephanidae (Hymenoptera) are revised and keyed. Three genera and 21 species (15 new) are recognised. The taxonomic importance of over 300 morphological characters, including 45 morphometric ratios, is assessed. The history of introduction and establishment of Schlettererius cinctipes in Australia is summarised. Stephanus crassicauda Morley is transferred to Megischus, the female is redescribed and the male is reported for the first time and compared with the female. Occurrence of the Neotropical genus Hemistephanus in Australia is refuted and M. giganteus (Girault) is synonymised with M. crassicauda (Morley). The groundplan of Australian Parastephanellus is described in detail and a new character set is proposed for taxonomic studies and descriptions of its species, P. albiceps Elliott is proposed as a junior synonym of P. damellicus (Westwood) and P. picticeps Roman is placed as species inquirendum. New taxa are Megischus ceneonatrix, Parastephanellus albigenuis, P. adiazetos, P. brevis, P. callidictyon, P. denotatus, P. isoglyptos, P. laevigatus, P. maculatus, P. platyceratus, P. squamatus, P. strigosus, P. tanytarsus, P. trifasciatus and P. vertipictus. Other valid species from Australia are P. caudatus Elliott and P. rufoornatus (Cameron).
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Smirnova, A. A., L. N. Prakhova, A. G. Ilves, N. A. Seliverstova, T. N. Reznikova, G. V. Kataeva, and E. P. Magonov. "Neuropsychological and morphometric biomarkers of poor prognosis in patients with mild cognitive impairment." Russian neurological journal 26, no. 6 (January 6, 2022): 4–15. http://dx.doi.org/10.30629/2658-7947-2021-26-6-4-15.
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Abstract. Despite a high prevalence of mild cognitive impairment (MCI), there are no accepted algorithms of diff erentiating the syndrome and the prognosis evaluation of later cognitive decline at this time. Objective. To identify biomarkers of poor prognosis in the various MCI types by optimizing neuropsychological examination in combination with MRI morphometry of brain structures. Patients and methods. We examined 45 patients (9 men, 36 women, mean age 72 ± 6.7 years) with MCI according to the modifi ed Petersen’s criteria and the DSM-5 criteria. All patients underwent the MMSE scale, the Detailed Neuropsychological Testing (DNT), which included a Ten Words Test (TWT), a “Double Test” (DT), a visual acuity test, a high-fi eld magnetic resonance imaging (MRI) of the brain with morphometry of cerebral structures (FreeSurfer, FSL). Results. According to the MMSE score, MCI were found in 26 (58%) patients. During the DNT, depending on the state of memory, 14 participants of the study identifi ed a non-amnestic type of MCI (na-MCI), 15 — an amnestic variant with impaired reproduction (ar-MCI), and 16 people — an amnestic type with a primary memory defect (apm-MCI). Volume changes of the anterior corpus callosum segment (CCA) were signifi cantly associated with the Immediate Recall after 4th reading and the Delayed Recall in the general MCI group (rho = 0.58; 0.58; p < 0.05) and the apmMCI group (rho = 0.6; 0.56; p < 0.05). Kruskal–Wallis Test showed that there were signifi cant group diff erences in the volumes of the CCA, right caudate nucleus, left cerebellar hemisphere cortex, posterior corpus callosum segment and left thalamus. At the same time, the fi rst three structures were combined into a set of informative features for differentiating the type of MCI based on the results of Forward stepwise Discriminant Analysis with a 77.3% accurate classifi cation rate (Wilks’s Lambda: 0.35962; approx. F (6.78) = 8.678, p < 0.001). ROC-analysis established the threshold values of the CCA volumes of ≤ 0.05% and the right caudate nucleus volumes of ≤ 0.23% (81.25% sensitivity in both cases; 62.1% and 60.7% specifi city; AUC 0.787 and 0.767; 95% CI 0.639–0.865 and 0.615–0.881; OR 7.1 and 6.7 (95% CI 1.6–30.6 and 1.6–29), associated with a memory defect in persons with MCI, while the ORs are 7.1 and 6.7 (95% CI 1.6–30.6 and 1.6–29), respectively. When both cerebral structures were included in the logit model, 88.6% classifi cation accuracy, 92.6% sensitivity, and 82.4% specifi city of the method were achieved. Conclusion. It has been demonstrated that classifying patients into the various types of MCI based on the data of memory function refl ected by the DNT and supplemented with MRI morphometry of the brain areas may be used as a sensitive and specifi c instrument for determining the category of patients with a high risk of Alzheimer’s disease. A neuropsychological profi le with a defect in primary memory, atrophic changes in anterior segment of the corpus callosum and the right caudate nucleus have been proposed as biomarkers of poor prognosis. Further longitudinal studies are necessary to clarify the proposed biomarkers of poor prognosis information and to detail the mechanisms of the neurodegenerative process.
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FROIDEVAUX, Jérémy S. P., Charlotte ROEMER, Clément LEMARCHAND, Joan MARTÍ-CARRERAS, Piet MAES, Vincent RUFRAY, Quentin URIOT, Sylvain URIOT, and Adrià LÓPEZ-BAUCELLS. "Second capture of Promops centralis (Chiroptera) in French Guiana after 28 years of mist-netting and description of its echolocation and distress calls." Acta Amazonica 50, no. 4 (December 2020): 327–34. http://dx.doi.org/10.1590/1809-4392202001451.
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ABSTRACT The Amazonian basin harbours some of the most bat-diverse ecosystems worldwide. Yet, information on elusive, high-flying bat species such as Molossidae is scarce or virtually missing in the literature, which hampers conservation efforts both locally and globally. The recent advent of new technologies specifically designed to survey bats, such as passive ultrasound detectors and acoustic lures, has significantly increased understanding of bat ecology and distribution, and has allowed researchers to gather new and valuable information which was impossible to collect in the past. We undertook a rapid bat diversity assessment in French Guiana using acoustic lures to aid in capturing high-flying insectivorous bat species. Here we report the second and third capture record of Promops centralis (Chiroptera, Molossidae) for French Guiana, captured after 28 years since the first and only captures so far in the county. One individual was a post-lactating female and represents the first record of breeding P. centralis in French Guiana. We provide (i) morphometric and acoustic data (including the species’ distress calls) as well as detail photography to aid in species identification; and (ii) COI and CytB sequences of the two individuals (first mitochondrial sequences for French Guiana).
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Mancinelli, Vania, Gian Paolo Cavinato, Francesco Ciavattella, Alessandro Cecili, Maurizio D’Orefice, Carmela Epifani, Gianluca Esposito, et al. "Plio-Pleistocene Landscape Evolution of the Turano River Basin (Central Apennines, Italy): Insights from Continental Deposits’ Analysis and Drainage Network Development." Geosciences 11, no. 6 (June 5, 2021): 245. http://dx.doi.org/10.3390/geosciences11060245.
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Quaternary continental deposits record spatio-temporal changes of the landscape and offer insights for drainage network analysis and paleoenvironmental reconstructions. This paper focuses on the Turano River, a left tributary of the Velino River, which flows in the southwestern Abruzzo area at the boundary with Lazio Region. Its basin preserves lithological and morphological field evidence particularly suitable for reconstructing the long-term geomorphological evolution of the Central Apennines and the drainage network development. In detail, the Turano River was investigated through a drainage basin-scale analysis incorporating morphometric analysis, field mapping, continental deposits analysis, and integrated drainage network analysis. This approach allowed us to define a drainage network reversal process, clearly highlighted by the spatial arrangement of continental deposits, spanning from Upper Pliocene to Holocene. The results also indicated tectonic activity as the main factor driving incision and river inversion processes. The work contributes to identifying and describing the main steps of the Quaternary landscape evolution of this mountainous catchment and its morphoneotectonic framework. Therefore, it could represent a methodological tool for multidisciplinary studies in similar mountainous catchments to support any territorial planning activity, from large infrastructure localization (i.e., artificial dams) to sustainable land management.
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Ojala, Antti E. K., Gustaf Peterson, Joni Mäkinen, Mark D. Johnson, Kari Kajuutti, Jukka-Pekka Palmu, Elina Ahokangas, and Christian Öhrling. "Ice-sheet scale distribution and morphometry of triangular-shaped hummocks (murtoos): a subglacial landform produced during rapid retreat of the Scandinavian Ice Sheet." Annals of Glaciology 60, no. 80 (October 28, 2019): 115–26. http://dx.doi.org/10.1017/aog.2019.34.
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AbstractHigh-resolution digital elevation models of Finland and Sweden based on LiDAR (Light Detection and Ranging) reveal subglacial landforms in great detail. We describe the ice-sheet scale distribution and morphometric characteristics of a glacial landform that is distinctive in morphology and occurs commonly in the central parts of the former Scandinavian Ice Sheet, especially up-ice of the Younger Dryas end moraine zone. We refer to these triangular or V-shaped landforms as murtoos (singular, ‘murtoo’). Murtoos are typically 30–200 m in length and 30–200 m in width with a relief of commonly <5 m. Murtoos have straight and steep edges, a triangular tip oriented parallel to ice-flow direction, and an asymmetric longitudinal profile with a shorter, but steeper down-ice slope. The spatial distribution of murtoos and their geomorphic relation to other landforms indicate that they formed subglacially during times of climate warming and rapid retreat of the Scandinavian Ice Sheet when large amounts of meltwater were delivered to the bed. Murtoos are formed under warm-based ice and may be associated with a non-channelized subglacial hydraulic system that evacuated large discharges of subglacial water.
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Tsuji, Linda A. "Anatomy, cranial ontogeny and phylogenetic relationships of the pareiasaurDeltavjatia rossicusfrom the Late Permian of central Russia." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 104, no. 2 (July 2013): 81–122. http://dx.doi.org/10.1017/s1755691013000492.
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ABSTRACTNew material of the pareiasaurDeltavjatia rossicusfrom the Kotel'nich locality, Kirov Province, Russia, is described in detail. The taxon is characterised by a distinctive pattern of dermal sculpture and the exaggerated embayment of the posterior skull roof, resulting in the dorsal exposure of the braincase. Postcranially,Deltavjatiashares some aspects of its morphology with basal pareiasaurs, including the osteoderm pattern. Features such as the forward-slanting and pointed iliac blade are shared with stratigraphically younger, more derived forms. Well-preserved material of the taxon spans a wide size-range, allowing an assessment of ontogenetic trends. A geometric morphometric analysis of the skull roof ofDeltavjatiareveals an allometric increase in snout length and postorbital area, a result that can serve as a basis for examining morphological trends within pareiasaurs. A reassessment of pareiasauromorph relationships, using both parsimony and Bayesian methods of phylogenetic inference, recovers similar topologies in both cases. Four Bayesian analyses were completed, with and without a gamma-shaped parameter and with and without the inclusion of autapomorphies. Despite differing taxon and outgroup selection, the recovered topologies are similar to previous phylogenies of pareiasaurian relationships, withDeltavjatiaappearing as a relatively basal taxon.
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Justamante, María Salud, José Ramón Acosta-Motos, Antonio Cano, Joan Villanova, Virginia Birlanga, Alfonso Albacete, Emilio Á. Cano, Manuel Acosta, and José Manuel Pérez-Pérez. "Integration of Phenotype and Hormone Data during Adventitious Rooting in Carnation (Dianthus caryophyllus L.) Stem Cuttings." Plants 8, no. 7 (July 15, 2019): 226. http://dx.doi.org/10.3390/plants8070226.
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The rooting of stem cuttings is a highly efficient procedure for the vegetative propagation of ornamental plants. In cultivated carnations, an increased auxin level in the stem cutting base produced by active auxin transport from the leaves triggers adventitious root (AR) formation from the cambium. To provide additional insight into the physiological and genetic basis of this complex trait, we studied AR formation in a collection of 159 F1 lines derived from a cross between two hybrid cultivars (2003 R 8 and 2101-02 MFR) showing contrasting rooting performances. In three different experiments, time-series for several stem and root architectural traits were quantified in detail in a subset of these double-cross hybrid lines displaying extreme rooting phenotypes and their parental genotypes. Our results indicate that the water content and area of the AR system directly contributed to the shoot water content and shoot growth. Moreover, morphometric data and rooting quality parameters were found to be associated with some stress-related metabolites such as 1-aminocyclopropane-1-carboxylic acid (ACC), the ethylene precursor, and the conjugated auxin indol-3-acetic acid-aspartic acid (IAA-Asp).
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Reinoso-Gordo, Juan Francisco, Deborah Barsky, Alexia Serrano-Ramos, José Antonio Solano-García, Carlos Alberto León-Robles, Carmen Luzón-González, Stefania Titton, and Juan Manuel Jiménez-Arenas. "Walking among Mammoths. Remote Sensing and Virtual Reality Supporting the Study and Dissemination of Pleistocene Archaeological Sites: The Case of Fuente Nueva 3 in Orce, Spain." Sustainability 12, no. 11 (June 11, 2020): 4785. http://dx.doi.org/10.3390/su12114785.
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Remote sensing is a useful tool for the documentation of archaeological sites. The products derived from a photogrammetric project applied to archaeology such as orthophotos and three-dimensional virtual reconstruction (3DVR), allow for detailed study of the Fuente Nueva 3 site in Orce. In our study of the Fuente Nueva 3 site in Orce, we used 3DVR intensively to map out the morphometric features of mammoth tusks exposed on the surface and a geological fault affecting the site’s deposits. To do so, we used imagery captured since 2017 in order to follow the evolution of ongoing excavations during each subsequent field season. We also integrated the 3DVR model in a videogame environment, to create a virtual reality (VR) that allows a VR navigation experience around the scenario using a head mounted display like Oculus Rift. The main features of this VR experience are: (1) It is ideal for the diffusion of archaeological contents since it permits an attractive presentation mode thanks to stereo visualization and realistic immersion sensations; (2) it provides a high level of detail all along the navigation experience, without incurring any damage to the archaeological remains; (3) it allows users to observe more details than they would in an in situ visit to the site; (4) it makes it possible to convert an archaeological site into portable heritage, opening up the possibility to extend visits to vulnerable groups: specifically those with reduced mobility. Our results show that using VR should permit enhancements to a visitor’s experience and contribute to the socio-economic development of the town of Orce, one of the Spanish municipalities with the lowest income.
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Hauck, Erik F., Werner Wittkowski, and Hans W. Bothe. "Intradural microanatomy of the nerve roots S1–S5 at their origin from the conus medullaris." Journal of Neurosurgery: Spine 9, no. 2 (August 2008): 207–12. http://dx.doi.org/10.3171/spi/2008/9/8/207.
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Object The conus medullaris and the nerve roots from S-1 to S-5 regulate bladder function as well as movement and sensation of the lower extremities. This most caudal region of the spinal cord has not been studied in great detail anatomically despite its important regulatory role. The goal of this analysis is to characterize the normal intradural microanatomy of the sacral nerve roots at their origin from the conus medullaris. Methods The thecal sacs from 20 cadavers were fixated in formaldehyde and dissected under the operative microscope. Results More than 50 rootlets originated from the conus medullaris over a distance of < 3 cm. The rootlets were loosely organized into bundles by the arachnoid membrane with decreasing diameters. These diameters were 1.7 mm (ventral)/2.4 mm (dorsal) at S-1, and 0.17 mm (ventral)/0.4 mm (dorsal) at S-5. The roots were separated by neither the dentate ligament nor interradicular gaps. The number of rootlets decreased in the rostrocaudal direction with 2 ventral and 5 dorsal rootlets at S-1, but only 1 ventral (inconsistently found) and 2 dorsal rootlets at S-5. Typically, 1 nerve anastomosis was present between adjacent dorsal roots from S-1 to S-4. Nerve anastomoses between ventral roots or rootlets of the same root were less frequent. The dorsal segment of origin (linea radicularis) decreased in length from 7.2 mm at S-1 to 4.8 mm at S-5. Conclusions The current study provides anatomical details and specific morphometric data of the intradural contents at the level of the conus medullaris. This information is valuable for intraoperative orientation, endoscopic navigation, and possible intradural nerve stimulation.
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Di Somma, Alberto, Luigi Maria Cavallo, Matteo de Notaris, Domenico Solari, Thomaz E. Topczewski, Manuel Bernal-Sprekelsen, Joaquim Enseñat, Alberto Prats-Galino, and Paolo Cappabianca. "Endoscopic endonasal medial-to-lateral and transorbital lateral-to-medial optic nerve decompression: an anatomical study with surgical implications." Journal of Neurosurgery 127, no. 1 (July 2017): 199–208. http://dx.doi.org/10.3171/2016.8.jns16566.
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OBJECTIVEDifferent surgical routes have been used over the years to achieve adequate decompression of the optic nerve in its canal including, more recently, endoscopic approaches performed either through the endonasal corridor or the transorbital one. The present study aimed to detail and quantify the amount of bone removal around the optic canal, achievable via medial-to-lateral endonasal and lateral-to-medial transorbital endoscopic trajectories.METHODSFive human cadaveric heads (10 sides) were dissected at the Laboratory of Surgical Neuroanatomy of the University of Barcelona (Spain). The laboratory rehearsals were run as follows: 1) preliminary preoperative CT scans of each specimen, 2) anatomical endoscopic endonasal and transorbital dissections and Dextroscope-based morphometric analysis, and 3) quantitative analysis of optic canal bone removal for both endonasal and transorbital endoscopic approaches.RESULTSThe endoscopic endonasal route permitted exposure and removal of the most inferomedial portion of the optic canal (an average of 168°), whereas the transorbital pathway allowed good control of its superolateral part (an average of 192°). Considering the total circumference of the optic canal (360°), the transorbital route enabled removal of a mean of 53.3% of bone, mainly the superolateral portion. The endonasal approach provided bone removal of a mean of 46.7% of the inferomedial aspect. This result was found to be statistically significant (p < 0.05). The morphometric analysis performed with the aid of the Dextroscope (a virtual reality environment) showed that the simulation of the transorbital trajectory may provide a shorter surgical corridor with a wider angle of approach (39.6 mm; 46.8°) compared with the simulation of the endonasal pathway (52.9 mm; 23.8°).CONCLUSIONSUsed together, these 2 endoscopic surgical paths (endonasal and transorbital) may allow a 360° decompression of the optic nerve. To the best of the authors' knowledge, this is the first anatomical study on transorbital optic nerve decompression to show its feasibility. Further studies and, eventually, surgical case series are mandatory to confirm the effectiveness of these approaches, thereby refining the proper indications for each of them.
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Peña-Santiago, Reyes, Joaquín Abolafia, and Sergio Álvarez-Ortega. "New proposal for a detailed description of the dorylaim spicule (Nematoda: Dorylaimida)." Nematology 16, no. 9 (2014): 1091–95. http://dx.doi.org/10.1163/15685411-00002834.
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The morphology of dorylaimid spicules is richer than usually conceived and shows interesting interspecific variations that have not received much attention. New ideas are proposed to describe these structures, including a delimitation or definition of their parts and a series of morphometrics, either (absolute) measurements or ratios. Three descriptive examples are presented. Several morphological characters (head shape, development of the ventral hump, etc.) and a number of morphometric features (total and relative lengths, relative size of the median piece, terminal tip width, etc.) are especially useful for species characterisation and comparative purposes.
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Tutur, Edo Kharisma Army, and Arif Rohman. "Morphometry Analysis of Sedayu Mountainous Catchment Areas from Detailed Aerial Photos." IOP Conference Series: Earth and Environmental Science 1047, no. 1 (July 1, 2022): 012014. http://dx.doi.org/10.1088/1755-1315/1047/1/012014.
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Abstract Morphometric analysis is a powerful tool to understand the hydrological process quantitatively and the main requirement to determine the hydrological characteristics of a watershed. Morphometric analysis to determine the drainage characteristics of the Sedayu River Sub-watershed, Semaka District, Tanggamus Regency, Lampung Province was carried out using Digital Elevation Model (DEM) data. The primary data used is aerial photography using drones, the location of aerial photos representing watersheds of concern. The catchment area morphometrics were obtained from the extraction of the morphometric characteristics of the combined DEM data from the mountain watershed and the analysis of topographic maps by using ArcGIS software. Based on reports over a period of time, at several points in the area there are frequent river floods that overflow during heavy rains. Morphometric analysis in flood-prone areas with high rainfall is needed. The morphology of the Sedayu area has contrasting variations consisting of several gentle alluvial plains, some of which are Bukit Barisan hills with varying slope variations. The Sedayu watershed in this study is divided into 3 sub-watersheds, namely: sub-watershed A, sub-watershed B, and sub-watershed C. However, only sub-watershed A is the focus of morphometric analysis because its longest river, record flood disasters, landslide records, and has upstream to residential. Morphometric analysis was carried out on parameters such as watershed area (A), watershed length (Lb), main river length (Ln ), watershed width (W), drainage density (Dd ), bifurcation ratio (Rb ), and circularity ratio (Rc ). The results of morphometric calculations are the length of the watershed 4.82 km, the length of the main river is Sub-watershed A 8.996 km, the width of the watershed 0.686 km, and watershed area 4.861 km2 Based on these results can be calculated drainage density (Dd ) 2.719 km/km2 which means Sub-watershed A of a rough type with the inundated surface, permeable sub-soil, and resistant to erosion. Bifurcation ratio (Rb ) is 3.333 which means sub-watershed A has a rapid rise and fall in floodwater. Then, the circularity Ratio (Rc ) 0.32 which means Sub-watershed A is elongated so that the peak discharge and decrease flow quickly and causes a link with the hydrological response of rainfall-runoff. The results of this morphometric characteristic analysis are the right reference for planning strategies for soil erosion control and soil conservation.