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Artykuły w czasopismach na temat "Mollusks – Classification"
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Carter, Joseph G., and George R. Clark. "Classification and Phylogenetic Significance of Molluscan Shell Microstructure." Notes for a Short Course: Studies in Geology 13 (1985): 50–71. http://dx.doi.org/10.1017/s0271164800001093.
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Like most classifications of molluscan shell microstructure published during the past 25 years (e.g., MacClintock, 1967; Kobayashi, 1964, 1971; Taylor, Kennedy and Hall, 1969, 1973; Grégoire, 1972a), the present one is based largely on Bøggild's (1930) monographic work, redefined from a modern perspective of combined light and scanning electron microscopy. However, this is the first attempt to integrate shell microstructure terminology for mollusks with that employed by students of bryozoan and brachiopod shell microstructure (e.g., Williams, 1968a,b, 1970, 1973; Williams and Wright, 1970; Armstrong 1968, 1969; Sandberg, 1971, 1977; Brunton, 1972; MacKinnon, 1974, 1977; MacKinnon and Williams, 1974; Iwata, 1981, 1982). An integration of nomenclatorial schemes is desirable for purposes of interphylum comparison, and is presently needed because there is considerable overlap and inconsistency in the application of microstructural terminology even within single molluscan classes. The present synthesis of shell microstructure nomenclature is possible primarily because of the extensive data base of invertebrate shell mineralogy, microstructure and especially ultrastructure published in more than 300 references in the past 15 years. To these data, the authors have contributed original information of shell mineralogy and microstructure for scores of Recent and fossil mollusks, brachiopods and bryozoans, with a clear emphasis on bivalved mollusks. Many inadequately described microstructure terms have been reanalyzed during the course of this study, either by examining species cited in the literature, or by using closely related species. Perhaps because they are better studied, but probably for other reasons as well, the diversity of molluscan shell microstructures is considerably greater than that of brachiopods and bryozoans combined (Carter, 1979). Consequently, most of the present nomenclature is based on mollusks, and only three of the major microstructural arrangements described in this guide (crossed bladed, semi-nacreous and semi-foliated) were known first in brachiopods or bryozoans and later recognized in molluscs.
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George J., Vazurkar N., Gite V.A., Jadhav T.S., and Dhangada P. "Comparative Study of Molluscan Diversity of Kelve and Shirgaon Beach, Palghar, Maharashtra (India)." Ecology, Environment and Conservation 30, suppl (2024): 75–78. http://dx.doi.org/10.53550/eec.2024.v30i01s.014.
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Coastal ecosystems, encompassing various habitats such as mangroves, coral reefs, beaches, cliffs, lagoons, and estuaries, are vital for the diversity of life. Mollusks, belonging to the phylum Mollusca in the animal kingdom, play a significant role in coastal ecosystems. They serve as important members of the food chain and exhibit remarkable ecological adaptations to various habitats. This research aims to investigate the diversity of mollusks at Kelwa and Shirgaon beaches in Palghar district, Maharashtra. The study will reveal the molluscan diversity at these specific locations, providing insights into their biological classification through systematic arrangement and accompanying shell photographs.
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Sulistiyo, Restu Budi, and Fakhri. "Malacofauna from Cappa Lombo Site: Environmental Reconstruction and Subsistence Strategies of The Bontocani Highland Karst Region, South Sulawesi." KALPATARU 32, no. 1 (2023): 47–62. http://dx.doi.org/10.55981/kpt.2023.1045.
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The remains of mollusk shell fragments are ecofacts that can explain the environmental conditions occupied by humans, especially in the context of the Holocene period in Sulawesi. This research answers questions related to the types of mollusks found in the cultural layer and aims to identify malacofauna remains at the Cappa Lombo site, Bontocani, South Sulawesi. The data collection method was carried out through excavation, and the analytical method involved taxonomic identification, external morphological identification, taxonomic classification, and documentation. This study successfully identified 10 families consisting of 15 genera and species. Terrestrial gastropod mollusks consist of the families Alycaeidae, Cyclophoridae, Ariophantidae, Dyakiidae, Clausiliidae, Achatinidae, and Camaenidae. Freshwater gastropods consist of 2 families, namely Pachychilidae and Viviparidae, while the bivalve class is only represented by the Cyrenidae family, which inhabits estuaries. Based on this identification, this research shows that the reconstruction of the environmental conditions around this site indicates a wet rainforest environment, which tends to be covered with vegetation and primary tropical forest. Additionally, during the occupancy period, there was a change in land use around this site. Data on the presence of mollusks also indicate consumption. Although mollusks were not a primary dietary source, humans during the Holocene at this site were able to utilize the aquatic environmental resources around the site they inhabited.
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Babushkin, Evgeny S., Ivan O. Nekhaev, Maxim V. Vinarski, and Liubov V. Yanygina. "Aliens and Returnees: Review of Neobiotic Species of Freshwater Mollusks in Siberia from the Kazakhstan Steppe to the Arctic Tundra." Diversity 15, no. 3 (2023): 465. http://dx.doi.org/10.3390/d15030465.
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This article reviews all available information on the species composition, current distribution, and origins of the neobiotic (non-indigenous and restoring the lost range) freshwater mollusks in Siberia. An extensive literary search has been carried out, and virtually all existing publications of recent decades on the findings of freshwater mollusk species new to Siberia were taken into account. We examined extensive malacological collections of some of Russia’s and Kazakhstan’s scientific organizations. The core of the examined material is our own observations and collections made in various parts of Siberia and adjacent areas. An annotated checklist of neobiotic species of mollusks reliably recorded in Siberia is presented, and probable mechanisms and “corridors” of infiltration of these species into the region are discussed. Most of the discovered snail species belong to a group popular among aquarists, and their source of introduction is obvious. Another large portion of species infiltrate into the region with the development of fish farming. A classification of species of neobiotic freshwater mollusks of Siberia was proposed and a forecast was made for changes in the Siberian freshwater malacofauna for the coming decades. In our opinion, at present it is possible to accept the newest stage in the genesis of the freshwater malacofauna of Siberia, occurring in conditions specific to the Anthropocene.
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Fusco, Giovanna, Aniello Anastasio, David H. Kingsley, et al. "Detection of Hepatitis A Virus and Other Enteric Viruses in Shellfish Collected in the Gulf of Naples, Italy." International Journal of Environmental Research and Public Health 16, no. 14 (2019): 2588. http://dx.doi.org/10.3390/ijerph16142588.
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To assess the quality of shellfish harvest areas, bivalve mollusk samples from three coastal areas of the Campania region in Southwest Italy were evaluated for viruses over a three-year period (2015–2017). Screening of 289 samples from shellfish farms and other locations by qPCR and RT-qPCR identified hepatitis A virus (HAV; 8.9%), norovirus GI (NoVGI; 10.8%) and GII (NoVGII; 39.7%), rotavirus (RV; 9.0%), astrovirus (AsV; 20.8%), sapovirus (SaV; 18.8%), aichivirus-1 (AiV-1; 5.6%), and adenovirus (AdV, 5.6%). Hepatitis E virus (HEV) was never detected. Sequence analysis identified HAV as genotype IA and AdV as type 41. This study demonstrates the presence of different enteric viruses within bivalve mollusks, highlighting the limitations of the current EU classification system for shellfish growing waters.
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Karetin, Yuriy A., Aleksandra A. Kalitnik, Alina E. Safonova, and Eduardas Cicinskas. "Description and classification of bivalve mollusks hemocytes: a computational approach." PeerJ 7 (June 21, 2019): e7056. http://dx.doi.org/10.7717/peerj.7056.
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The fractal formalism in combination with linear image analysis enables statistically significant description and classification of “irregular” (in terms of Euclidean geometry) shapes, such as, outlines ofin vitroflattened cells. We developed an optimal model for classifying bivalveSpisula sachalinensisandCallista brevisiphonataimmune cells, based on evaluating their linear and non-linear morphological features: size characteristics (area, perimeter), various parameters of cell bounding circle, convex hull, cell symmetry, roundness, and a number of fractal dimensions and lacunarities evaluating the spatial complexity of cells. Proposed classification model is based on Ward’s clustering method, loaded with highest multimodality index factors. This classification scheme groups cells into three morphological types, which can be distinguished both visually and by several linear and quasi-fractal parameters.
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Movsesyan, S. O., M. A. Nikoghosian, R. A. Petrosian, et al. "Life Cycles of Lung Helminths in Terrestrial Mammals from Eastern Europe and Their Biological Classification." Известия Российской академии наук. Серия биологическая, no. 5 (September 1, 2023): 507–19. http://dx.doi.org/10.31857/s102634702260114x.
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This article has been prepared based on the results of many years of the authors' studies in the framework of scientific cooperation between Academies of Science of Russia, Armenia, Bulgaria and Poland. It is a continuation of one published in Annals of Parasitology: Biodiversity of Lung Helminths in Terrestrial Mammals from Eastern Europe (2021). To determine the biological diversity of lung helminths various vertebrate hosts were studied, including 7 species from Armenia, 13 from Russia, 7 from Bulgaria and 10 from Poland, as well as many invertebrate potential hosts, mainly land mollusks. Three types of development cycles were found to be characteristic for lung helminthes: 1 – Nematodes from family Dictyocaulidae developing in a direct way without using intermediate hosts, geohelminths or monoxenous type of development. 2 – Those nematodes life cycles of which include intermediate hosts which are mainly land mollusks. These are species from family Protostrongylidae – biohelminths, dixenous type. 3 – Life cycles also include intermediate hosts, but here they are vertebrate. This type includes cestodes Echinococcus granulosus and Alveococcus multilocularis – biohelminths, dixenous type.
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Filipenco, Serghei. "Structure of the zoobenthos communities from Dubasari and Kuchurgan reservoir based on the zoogeographic classification." Akademos, no. 2(69) (August 2023): 41–45. http://dx.doi.org/10.52673/18570461.23.2-69.03.
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The Dubasari reservoir is located on the river Nistru, while the Kuchurgan reservoir is a lake type and serves as a cooling reservoir for the Moldovan Thermal Power Plant. Reservoir zoobenthos is mainly formed of thermophilous Palearctic species of the Holarctic region (mainly oligochaetes and chironomids), including PontoCaspian relicts (polychaetes, higher crustaceans, and mollusks). There are 18 species of Ponto-Caspian relicts in the Dubasari reservoir and 25 species in the Kuchurgan reservoir. North American and Southeast Asian introduced species in the zoobenthos of the Dubasari reservoir are represented by one species, and in the Kuchurgan reservoir by three species. The most significant commonality (0,74 according to the Sorensen index) and similarity (0,59 according to the Jaccard index) of the species composition of zoobenthos are typical for the Ponto-Caspian fauna of reservoirs.
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Budd, Ann F., Charles T. Foster, John P. Dawson, and Kenneth G. Johnson. "The Neogene Marine Biota of Tropical America (“NMITA”) database: Accounting for biodiversity in paleontology." Journal of Paleontology 75, no. 3 (2001): 743–51. http://dx.doi.org/10.1017/s0022336000039779.
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The reliability of any survey of biodiversity through geologic time depends on the rigor and consistency by which taxa are recognized and samples are identified. The main goal of the Neogene Marine Biota of Tropical America (‘NMITA’) project is to create an online biotic database (http://nmita.geology.uiowa.edu) containing images and synoptic taxonomic information that are essential to collecting and disseminating high-quality taxic data. The database consists of an inventory of taxa collected as part of several large multi-taxa fossil sampling programs designed to assess marine biodiversity in tropical America over the past 25 m.y. In the first phase of the project, data for ~1,300 taxa and ~3,800 images are currently being entered into a relational database management system on an IBM RS6000 at the University of Iowa. Eleven taxonomic groups are represented: bivalves, gastropods (muricids, marginellids, strombinids), bryozoans (cheilostome, cyclostome), corals (azooxanthellate, zooxanthellate), benthic foraminifers, ostracodes, fish. The lowest taxonomic rank is species (genera/subgenera in mollusks) and the highest is family. Data that are collected and displayed on taxon pages include: (1) taxonomic authorship, synonyms, type specimens, and diagnostic morphologic characters; (2) images of representative specimens and associated museum catalog and measurement data; (3) distributional information including geologic ages, stratigraphic units, and spatial locations; and (4) higher level classification (genera and families) and bibliographic information. Illustrated glossaries of morphologic terms, character matrices, and identification tools are being developed for corals and mollusks. Interactive geographic maps and stratigraphic columns have been designed to provide information about taxa collected at different locations.
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Popov, A. N., Kanomata Yoshitaka, M. K. Rudenko, and B. V. Lazin. "A Functional Analysis of Lithics of the Early Iron Age Yankovsky Culture: New Findings." Archaeology, Ethnology & Anthropology of Eurasia 50, no. 2 (2022): 60–70. http://dx.doi.org/10.17746/1563-0110.2022.50.2.060-070.
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We present the results of a functional analysis of lithics of the Yankovsky culture (800 BC to the turn of the millennium) from two sites–Cherepakha-7 and Solontsovaya-2, excavated over large areas during salvage works in 2015 and 2017, respectively. Such tools are traditionally described as axes, adzes, chisels, knives, spearheads, and projectile points. Certain findings of the functional analysis disagree with this classification. The question arises of the correspondence between formal typological and traceological criteria. For functional analysis, the so-called Keeley method, or High Power Approach, was used, along with the classification of polishing types, elaborated at Tohoku University (Japan). Functions of 28 of the 62 tools selected for high-precision functional analysis were assessed. The existing nomenclature of woodworking tool types is clarified, information on the technique of harvesting herbaceous plants and on leatherworking tools is significantly specified. More details are provided on tools involved in bone carving, as well as those used to open shells of bivalve mollusks. The High Power Approach has enhanced our understanding of the functions of stone tools, which, despite the use of metals, were basic in Yankovsky technologies. Further directions of traceological studies are suggested.
Rozprawy doktorskie na temat "Mollusks – Classification"
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Huang, Qin, and 黃勤. "Polymorphism in twelve species of Neritidae: (Mollusca : Gastropoda : Prosobranchia) from Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1995. http://hub.hku.hk/bib/B31234896.
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Tillier, Simon. "Morphologie comparée, phylogénie et classification des Gastéropodes Pulmones Stylomatophores (Mollusca)." Paris 6, 1985. http://www.theses.fr/1985PA06A002.
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Magalhães, Frederico Thomaisino 1981. "Mollusca Bivalvia da Baía do Almirantado, Ilha Rei George, Antártica : taxonomia e distribuição." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315908.
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Orientador: Flávio Dias Passos<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-20T10:56:39Z (GMT). No. of bitstreams: 1
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Previous issue date: 2012<br>Resumo: O Brasil aderiu ao "Tratado Antártico" em 1975, e desde 1982 mantém o "Programa Antártico Brasileiro. A partir de 1984 as pesquisas brasileiras se concentraram na Baía do Almirantado, na Ilha Rei George, onde se localiza a base do país. A Baía do Almirantado foi eleita uma "Área Antártica Especialmente Gerenciada" pelas Partes Consultivas do Tratado Antártico e trata-se de um local representativo do ecossistema costeiro antártico, principalmente em termos de distribuição e composição de espécies. Lá os pesquisadores tem estudado a fauna bentônica da região, entre eles os Mollusca, que são abundantes e importantes no estudo dos processos que determinam a estrutura e o funcionamento das comunidades bentônicas marinhas. Este estudo se focou na classe Bivalvia, provendo um novo material de referência para identificação destes animais, e mais especificamente daqueles da Baía do Almirantado, apresentando-se como um guia ilustrado, com descrições detalhadas das conchas dessas espécies. Além disso, dados de distribuição geográfica e batimétrica foram reunidos para uma análise dessa fauna, na tentativa de qualificar a importância da região das Ilhas Shetland do Sul como um local estratégico para estudos em biogeografia. Foram identificadas 39 espécies de 18 famílias distintas, e seus dados de biologia, distribuição batimétrica e geográfica reunidos. As famílias mais representativas foram Philobryidae, Nuculanidae e Lasaeidae, contabilizando 15 espécies. As regiões com mais espécies em comum com a área estudada foram o Estreito de Magalhães, Ilha Georgia do Sul, Mar de Weddell, Península Antártica e sul do Chile; regiões notáveis pela riqueza de Bivalvia. As famílias mais largamente distribuídas, encontradas neste estudo, foram LImidae e Carditidae; e as mais restritas foram Siliculidae e Nuculanidae. A espécie com maior distribuição foi Cyclocardia astartoides, e as mais restritas Ennucula georgiana e Mysella narchii. As espécies encontradas se concentram nas profundidades até 1000 m, com seu número caindo para menos da metade além disso. Apenas seis espécies ocorrendo além dos 2000 m: Yoldiella profundorum, Limopsis marionensis, Limopsis lilliei, Adacnarca nitens, Limatula pygmaea e Cyclocardia astartoides. Este estudo demonstram a região da Baía do Almirantado como abrigo de uma fauna de Bivalvia composta por espécies estritamente antárticas, e outras que ocorrem ao norte da Convergência Antártica; sendo assim uma região importante para o estudo da distribuição destes animais<br>Abstract: Brazil abided to the "Antarctic Treaty" in 1975, and since 1982 maintains the "Brazilian Antarctic Program". As from 1984 the Brazilian researches focused on Admiralty Bay, in King George Island, where the country?s Antarctic base is located. Admiralty Bay was elected a "Antarctic Especially Managed Area" by the Antarctic Treaty Consultative Parties and is a representative place for the Antarctic coastal ecosystem, especially in views of species distribution and composition. In there researchers have been studying the regional benthic fauna, amidst it the Mollusca, abundant and important animals for the study of determinant process in the structure and operation of the marine benthic community. The present study focused on the class Bivalvia, providing a new reference source for identification of the group, and specifically for those of Admiralty Bay, presented as an illustrated guide with detailed shell descriptions for all the species found. Furthermore, data on geographic and bathymetric distribution were gathered for an analysis of this fauna, in attempt to qualify the importance of the South Shetland Islands as a strategic place for studies on biogeography. Thirty-nine species, of 18 distinct families, were identified, and their biological, geographical and bathymetrical data gathered. The most representative families were Philobryidae, Nuculanidae and Lasaeidae, counting 15 species in sum. The geographic regions with more species in common with the studied area were Strait of Magellan, South Georgia Island, Weddell Sea, Antarctic Peninsula and Southern Chile; notable regions for Bivalvia richness. The families found with the largest geographic distribution were Limidae and Carditidae, and the most restricted ones were Siliculidae and Nuculanidae. The species with largest geographical distribution was Cyclocardia astartoides, while the most restricted were Ennucula georgiana and Mysella narchii. The species found in this study are concentrated in depths until 1000 m, beyond that their number shortens to less than half. Only six occur deeper than 2000 m: Yoldiella profundorum, Limopsis marionensis, Limopsis lilliei, Adacnarca nitens, Limatula pygmaea and Cyclocardia astaroides. The present study shows Admiralty Bay as shelter to a Bivalvia fauna with strictly Antarctic species and northern ones, common north to the Antarctic Convergence, thus being an important place for studying the distribution of these animals<br>Mestrado<br>Ecologia<br>Mestre em Ecologia
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Hudelot, Cendrine. "La systématique des Octobrachia (Mollusca ;Cephalopoda) : une approche moléculaire." Paris, Muséum national d'histoire naturelle, 2000. http://www.theses.fr/2000MNHN0030.
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Les octobrachia sont des mollusques marins qui appartiennent à la classe des cephalopodes. Ce sont des animaux à corps mou pour lesquels il est difficile de trouver des caractères morphologiques discriminants. Une étude moléculaire a donc été menée afin d'apporter des informations complémentaires quant aux relations de parenté entre les espèces actuelles. . .
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Moretzsohn, Fabio. "Exploring novel taxonomic character sets in the Mollusca : the Cribrarula cribraria complex (Gastropoda:Cypraeidae) as a case study." Thesis, University of Hawaii at Manoa, 2003. http://hdl.handle.net/10125/3065.
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The goal of this dissertation is to explore novel and non-traditional taxonomic characters that may be useful for mollusks, and combine them with radular and shell characters to carry out a taxonomic review of the genus Cribrarula (Cypraeidae). Shells in this genus have conspicuous dorsal spots, but like odler cowries, lack sculpture, spines, and other shell characters commonly used in gastropod taxonomy. For these reasons, cowrie shells are considered uninformative. The study of dorsal spots (DS) and related characters suggest that at least in this complex, the dorsal spots may represent a record of the mantle papillae. If the hypothesis is correct, then DS may provide information on the soft parts that previously was only available from the study of live or preserved specimens. Each species in the complex has a species-specific range of DS, marginal spots, and allied characters, thus suggesting that they may be useful in distinguishing species in the complex. The odontophore cartilage provides support for the radula and attachment for the muscles responsible for feeding. Although intimately connected to the radula and known since the 1800's, the taxonomic value of the odontophore has been overlooked. A study of odontophore variation in the family Cypraeidae proposes the structure as a novel taxonomic character, potentially applicable to most mollusks. The Cribrarula cribraria Linnaeus, 1758 complex is reviewed, and twelve species and six subspecies are recognized on the basis of multivariate analyses of shell characters, the radula, odontophore, and geographic distribution. The shell, radula, odontophore and distributional maps are illustrated for each taxon. The nominal species, cribraria, ranges from East Africa to the Central Pacific, and several populations are distinctive enough to be recognized as subspecies. The other eleven species are restricted to narrower ranges along the periphery of the distribution of cribraria. During the review of Cribrarula, a new species from New South Wales was described as C. gravida Moretzsohn, 2002.<br>Thesis (Ph. D.)--University of Hawaii at Manoa, 2003.<br>Includes bibliographical references (leaves 302-323).<br>Mode of access: World Wide Web.<br>Also available by subscription via World Wide Web<br>xxvii, 323 leaves ill., maps 29 cm. +
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Nguyen, Xuan Tong, Thi Thu Huong Tran, Thi Thuy Duong, et al. "Bioaccumulation of organochlorine pesticides (OCPs) in molluscs and fish at the Sai Gon - Dong Nai estuary." Technische Universität Dresden, 2018. https://tud.qucosa.de/id/qucosa%3A33295.
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The aim of this study is to assess the biological accumulation of pesticide residues in aquatic organisms in Sai Gon - Dong Nai (SG-DN) estuary. Fish and mollusks were collected directly at the Soai Rap and Long Tau estuary of the SG-DN river system, washed and separated for taking the tissue. The organochlorine compounds from the tissue were then extracted and analyzed by gas chromatography system. The results showed that, the concentration of OCPs in Tegillarca granosa, Meretrix lyrata, Margaritifera auricularia and Bostrychus sinensis varied from 6.4 to 59.9 μg/kg, 7.2 to 322 μg/kg, 4.5 to 62.1 μg/kg and 2.9 to 114.3 μg/kg fresh weight, respectively. In general, molluscs species that accumulate more heptachlor, aldrin, endrin or dieldrin tend to accumulate less DDT (dichlorodiphenyltrichloroethane). Endosulfan was the most commonly found in three bivalve mollusks while DDTs (1.5–75.2 μg/kg, averaging 8.7 μg/kg weight) was the most popular OCPs in the fish (Bostrychus sinensis) samples. In DDT group, the p,p’-DDT metabolite accounted for the largest percentage, reaching 50% of total DDTs. In HCH (Hexachlorocyclohexane) group, β-HCH isomer was predominant in almost samples.<br>Mgr đích ccc nghiên cch này là đánh giá tích lũy sinh hhn ccn thuu trr sâu trong các sinh vvn ssnh dưưh nưưh ttư khu vvu ccu sông Sài Gòn - ĐĐn Nai (SG-DN). Cá và nhuyyu thh đưưy llư trry tiiy iicửa sông Soài RRà và Lòng Tàu thuu hh thhu sông SG-DN, đư-D rư- ss-D và tách llc phhh mô thht. Các hhc chh clo hho cơ sau đó đưưđ tách chii và phân tích bbch hh thhh ssh ký khí. Kết quả
nghiên cứu cho thấy, dư lượng OCPs tích tụ trong sò điệp (Tegillarca granosa), ngao (Meretrix lyrata), trai nước ngọt (Margaritifera auricularia) và cá bớp (Bostrychus sinensis) dao động tương ứng từ 6,4 đến 59,9 μg/kg, 7,2 đến 322 μg/kg, 4,5 đến 62,1 μg/kg và 2,9 đến 114,3 μg/kg trọng lượng tươi. Nhìn chung, loài nhuyễn thể nào tích lũy nhiều heptachlor, aldrin, endrin hoăc dieldrin có xu
hướng tích lũy ít DDT (Dichlorodiphenyltrichloroethane). Endosunfan là nhóm thuốc được tìm thấy nhiều nhất trong các loài nhuyễn thể nghiên cứu. Ngược lại, nhóm DDT lại phổ biến ở cá Bostrychus sinensis (1.5–75.2 μg/kg, trung bình 8.7 μg/kg trọng lượng). Dạng p.p’-DDT trong nhóm DDT chiếm tỷ lệ cao nhất, tới 50% DDT tổng. Trong khi đó, đồng dạng β-HCH của nhóm HCH (Hexachlorocyclohexane) chiếm đa số trong hầu hết các mẫu.
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Nangammbi, Tshifhiwa Constance. "Systematics of the phasianelloidea in Southern Africa : (Mollusca: Gastropoda: Vetigastropoda)." Thesis, 2010. http://hdl.handle.net/10413/10852.
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The taxonomy and biogeography of the southern African pheasant shell fauna are poorly
known. Thirty–one nominal taxa referable to Phasianelloidea have been described or
recorded in this region, but no systematic revision of these has ever been undertaken.
Morphological evidence suggests that 16 taxa represent valid species, 13 are synonyms and
two represent incorrect identifications. DNA sequence data from mitochondrial COI and 16S
markers are used to assess the validity of the described nominal southern African Tricolia
species. Phylogenetic analyses recovered seven distinct clades. Tricolia adusta, T. elongata,
T. formosa, T. kochii, T. saxatilis and T. neritina were recovered as distinct species. Tricolia
africana and T. capensis are genetically indistinguishable. However, morphological
characters of the shell are clearly diagnosable. This could be due to incomplete sorting
(ancestral polymorphism) reflecting recent speciation with rapid morphological and
ecological divergence co–incident with geographical separation. Similarly, there is little
genetic differentiation between T. bicarinata, T. insignis and T. kraussi. In this case the
similarity is also supported by morphological data as the three species are conchologically
close with intergrading shell characters, and might even be one species exhibiting
ecogeographic variation in shell form. Monophyly of the southern African Tricolia species is
not supported as well as the relationship between these and the European Tricolia pullus. In
the last chapter a molecular phylogeny based on sequence data from mtDNA (COI and
16S), nuclear (18S and 28S) and the combined data (COI, 16S, 18S and 28S) is presented
for the Phasianelloidea. Bayesian inference analyses performed on the combined data
support the monophyly of Tricolia sensu stricto, Eulithidium and Phasianella. Tricolia sensu
lato is not monophyletic, as its southern Australian and Indo–West Pacific species do not
cluster with its southern African and Eastern Atlantic representatives. The position of Hiloa
and Gabrielona within the Phasianelloidea is unresolved. Phylogenetic reconstructions using
bayesian inference support monophyly of the Phasianelloidea.<br>Thesis (Ph.D.)-University of KwaZulu-Natal, Pietermaritzburg, 2010.
Książki na temat "Mollusks – Classification"
1
Millard, Victor. Classification of Mollusca: A classification of world wide Mollusca. 3rd ed. Victor Millard, 2003.
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Carter, Joseph Gaylord. A synoptical classification of the Bivalvia (Mollusca). Paleontological Institute, The University of Kansas, 2011.
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Son, Min-ho. Pusan ŭi p'aeryu: Mollusks in Busan. Pugyŏng Taehakkyo Ch'ulp'anbu, 2005.
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Vaught, Kay Cunningham. A classification of the living Mollusca. American Malacologists, 1989.
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Charles, Lydeard, and Lindberg David R. 1948-, eds. Molecular systematics and phylogeography of mollusks. Smithsonian Books, 2003.
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Kaiser, Kirstie L. The recent molluscan marine fauna of the Islas Galápagos. San Diego Shell Club, 1997.
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Goto, Yoshihiro. A listing of living Mollusca. L'informatore piceno, 1996.
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Kantor, I͡U I. Katalog molli͡uskov Rossii i sopredelʹnykh stran. T-vo nauch. izd. KMK, 2005.
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Thiele, Johannes. Handbook of systematic malacology. Smithsonian Institution Libraries : National Science Foundation, 1992.
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Barash, Al. Rakikhot ha-Yam-ha-tikhon be-Yiśraʼel. ha-Ḥevrah la-haganat ha-ṭevaʻ, 1993.
Znajdź pełny tekst źródłaCzęści książek na temat "Mollusks – Classification"
1
Rees, Paul A. "Platyhelminths, annelids and molluscs." In Key questions in biodiversity: a study and revision guide. CABI, 2021. http://dx.doi.org/10.1079/9781789248630.0007.
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Lindgrenb, Annie, and A. Louise Allcock. "Cephalopod mollusks (Cephalopoda)." In The Timetree of Life. Oxford University PressOxford, 2009. http://dx.doi.org/10.1093/oso/9780199535033.003.0027.
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Abstract The class Cephalopoda is a monophyletic group which can be divided into two subclasses; Nautiloidea and Coleoidea. Nautiloidea contains the nautiluses (Nautilus and Allonautilus), whereas Coleoidea contains the octopuses (Fig. 1), squids, and cuttleAshes. Coleoid cephalopods diBer from nautiloids most notably through the reduction (or complete loss) and internalization of the shell. DeAning features of Coleoidea include a muscular mantle used for locomotion and respiration, the modiAcation of the foot into appendages around the mouth, a closed circulatory system, and complex eyes with lenses, although many of these features have been lost or reduced in various taxa. The widely cited annotated classification of the recent Cephalopoda (1) listed over 700 valid species in 139 genera and 47 families. Here we review the evolutionary relationships and divergence times of the members of the class Cephalopoda. Several alternative classifications have been proposed for relationships within Cephalopoda (2). Herein we follow the classification of Young et al. (3) that generally does not include ranks above the family level; however, we make certain assumptions about rank based on nomenclature and position.
3
Brusca, Richard C., Gonzalo Giribet, and Wendy Moore. "Introduction to the Lophotrochozoa, and the Phylum Mollusca." In Invertebrates. Oxford University Press, 2022. http://dx.doi.org/10.1093/hesc/9780197554418.003.0013.
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This chapter provides an overview of the Lophotrochozoa and the phylum Mollusca. The Mollusca, Nemertea, Annelida, and the three lophophorate phyla comprise the clade Lophotrochozoa in the form of the so-called small shelly fossils. Molluscs comprise the second largest phylum of animals (after arthropods) and include some of the best-known invertebrates. The chapter then details the body plan and the very long and convoluted taxonomic history and classification of molluscs. Despite the enormous diversity, all molluscs share a suite of defining characteristics that include bilateral symmetry, reduced coelom, visceral mass, body covered by the mantle, ctenidia, radula and spiral cleavage.
4
Crandalla, Keith A., Megan L. Porterc, and Marcos Pérez-Losada. "Crabs, shrimps, and lobsters (Decapoda)." In The Timetree of Life. Oxford University PressOxford, 2009. http://dx.doi.org/10.1093/oso/9780199535033.003.0036.
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Abstract Crustaceans comprise the fourth most species-rich group of metazoans on the planet, following insects, chelicerates, and mollusks. But in terms of morphological diversity (disparity), they are unrivaled (see 1, 2). Foremost among the crustaceans in number and diversity are the decapods. With over 15,000 described species they include those crustaceans most familiar to the general public—shrimp, lobsters, crabs (Fig. 1), and crayAsh— but also lesser known and unusual groups (3). themost recent classification (2) partitions 62,000 species of extant Crustacea among 849 families (compared to 874 families for all 1.6 million species of insects). Approximately 152 of those extant families belong to the Decapoda with another 20 families known only from fossils, an enormous assemblage that has been called “the pinnacle of crustacean evolution.” More than six new families of decapods have been recognized since 2001 from both extant (e.g., 4, 5) and extinct (e.g., 6, 7) groups. 7us, 18% of all described crustacean families belong to the decapods. Additionally, some 91 decapod families contain fossil taxa, including 27 known only from fossils (8).
5
Thompson, T. E. "Classification." In Molluscs: Benthic opisthobranchs (Mollusca:Gastropoda). BRILL, 1988. http://dx.doi.org/10.1163/9789004627536_006.
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Brown, Kenneth M., and Charles Lydeard. "Mollusca." In Ecology and Classification of North American Freshwater Invertebrates. Elsevier, 2010. http://dx.doi.org/10.1016/b978-0-12-374855-3.00010-8.
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Cummings, Kevin S., and Daniel L. Graf. "Mollusca." In Ecology and Classification of North American Freshwater Invertebrates. Elsevier, 2010. http://dx.doi.org/10.1016/b978-0-12-374855-3.00011-x.
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Kültz, Dietmar. "Overview of aquaculture species diversity." In A Primer of Ecological Aquaculture. Oxford University PressOxford, 2022. http://dx.doi.org/10.1093/oso/9780198850229.003.0007.
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Abstract Aquaculture species diversity is much greater than that of farmed terrestrial species and they occupy more diverse positions within the network of life. The species that form the network of life are classified by the discipline of taxonomy founded by Carl von Linné, who introduced the unambiguous binomial nomenclature of species. Taxonomic classification of species within higher-level categories in the network of life is based on their phylogenetic (ancestral) relationships that can be revealed by comparing their genomes. Many aquatic animals are used for aquaculture, but three taxa dominate: fish (class of subphylum vertebrates), molluscs (a phylum), and crustaceans (subphylum of phylum arthropods). Although many aquatic species are being cultured, only a handful of fish, mollusc, and crustacean species are produced at high quantity and account for most of global seafood production. Freshwater fish, in particular carp, contribute most to aquaculture yields. A single marine species of crustaceans (Western whiteleg shrimp) accounts for more than half of crustacean aquaculture, the remainder being contributed mostly by freshwater crayfish and prawns. Molluscs are farmed almost exclusively by mariculture with cupped oysters such as the Pacific (Japanese) cupped oyster dominating mollusc aquaculture for production of seafood. Aquaculture production of marine seaweed has tripled since the turn of the millennium but its exact contribution to seafood production is difficult to estimate because of alternative uses.
9
Graham, Alastair. "Classification." In Molluscs: Prosobranch and pyramidellid gastropods. BRILL, 1988. http://dx.doi.org/10.1163/9789004627512_013.
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Morris, N. J. "Early radiation of the Mollusca." In Major Evolutionary Radiations. Oxford University PressOxford, 1991. http://dx.doi.org/10.1093/oso/9780198577188.003.0004.
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Abstract During the last three decades more and more Cambrian Mollusca have been discovered, particularly among the small shelly faunas of the Lower and Middle Cambrian. Many of these have led to considerable discussion about their classification and the course of molluscan phylogeny. These early molluscs show an important radiation at the beginning of the Phanerozoic which led to the diversification into the recognized classes living today. This radiation seems to have been dependent on the origin of a dorsal exoskeleton and its subsequent calcification, and possibly its interference with the ancestral pattern of simple metamery. The apparent synchronous development of a skeleton in several independent phyla suggests there may be a link with changing composition of the atmosphere and sea.
Streszczenia konferencji na temat "Mollusks – Classification"
1
Caysido, Christopher Nilo A., Ezekiel J. Mariano, and Dionis A. Padilla. "Deep Learning-Based Classification of Bivalve Mollusk Species Using MobileNetV3 Architecture." In 2023 IEEE 15th International Conference on Humanoid, Nanotechnology, Information Technology, Communication and Control, Environment, and Management (HNICEM). IEEE, 2023. http://dx.doi.org/10.1109/hnicem60674.2023.10589139.
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