Relevant bibliographies by topics / Ostracode

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
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Academic literature on the topic 'Ostracode'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 May 2024

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Journal articles on the topic "Ostracode"

1

CHATTERJEE, TAPAS, IGOR DOVGAL, ROSAURA MAYÉN-ESTRADA, and GREGORIO FERNANDEZ-LEBORANS. "A checklist of ciliates (Ciliophora) inhabiting on ostracods (Crustacea, Ostracoda)." Zootaxa 4763, no. 1 (April 8, 2020): 17–30. http://dx.doi.org/10.11646/zootaxa.4763.1.2.

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A compilation of the ciliated species found on freshwater and marine ostracods as epibiont or parasite (endobiont) has been carried out based on published records. The checklist includes the taxonomic position of each species of epibiontic and endobiontic ciliate, the species of basibiont ostracodes, the geographic zones and the bibliographic references where they were recorded. Altogether 7 suctorian, 29 peritrich, one apostome and one scuticociliatid species were listed. Two of recorded suctorian species are possible specific to marine ostracodes, whereas only one, Tokophrya sibirica to freshwater hosts. Fourteen species of peritrichs are likely specific to freshwater ostracodes, while three possible specific to marine ostracode hosts. Other suctorian and peritrich ciliate species were found on a variety of host taxa. One species of scuticociliatid was recorded as endobiont in ostracod.
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2

Ayress, Michael A. "Crescenticythere, a new enigmatic ostracode from the Tertiary of New Zealand." Journal of Paleontology 67, no. 5 (September 1993): 905–6. http://dx.doi.org/10.1017/s0022336000037197.

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During examination of the large ostracode assemblage collections at the Department of Scientific and Industrial Research, Geology & Geophysics, Lower Hutt, New Zealand, a single specimen of unusual shape was encountered. So unusual is the crescentic outline and infolding of the entire shell periphery that assignment even to a phylum was difficult, and it was only upon scanning electron microscopic study that subcentral muscle scars were clearly observed and these enabled confident identification of the specimen as an ostracode. One specimen is not usually considered sufficient to propose a new taxon; however, in this case there is no doubt that this unique specimen clearly represents a new species, genus, and probably family of Ostracoda. A search for additional specimens from the type unit is underway, but has, as yet, been unsuccessful to find this rare intriguing ostracode. Unlike other unusual ostracodes described from the Southern Hemisphere such as the punciids, this specimen appears to have no similarity with Paleozoic taxa.
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3

Baltanás, Angel, Wolfgang Brauneis, Dan L. Danielopol, and Johann Linhart. "Morphometric Methods for Applied Ostracodology: Tools for Outline Analysis of Nonmarine Ostracodes." Paleontological Society Papers 9 (November 2003): 101–18. http://dx.doi.org/10.1017/s1089332600002175.

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Morphometric techniques for the analysis of shape change in organisms have experienced a noteworthy development in the last decade. But despite the significant contributions that ostracodologists made to the field, their use in standard ostracode research is far from common. This contribution stresses the usefulness of morphometric methods to describe ostracode valve outlines and to summarize shape changes cued by environmental factors. Focus is on nonmarine ostracodes which are generally poorly ornamented so that their carapaces offer few landmarks for characterization of morphological change. Out of several alternatives three techniques for shape analysis are applied here: the B-splines method for approximative description of ostracode contours, Elliptic Fourier Analysis (EFA) and a Generalized (Resistant Fit) Procrustes Analysis. B-splines method is presented here for the first time within a biological framework and both its mathematical basis and practical usage are discussed. Additionally a computer program, Morphomatica, developed for performing B-splines analyses of ostracod outlines is briefly documented.Three case studies exemplify here how morphometric analysis might help either to detect environmental influences in ostracode shape or to show how morphological diversity of ostracode valve reflects environmental change. First, morphological variability within a clonal lineage of Heterocypris barbara (Gauthier and Brehm) is shown to be related to environmental variables (mainly temperature) when raised under controlled conditions in the lab. Second, carapace variability at the population level is explored in a widely distributed species (Limnocythere inopinata Baird) sampled from distant localities. Morphometric analyses illustrate how such variability is not related to geographic distance but to environmental conditions. Finally, patterns of temporal change in morphological diversity of a widely distributed ostracode group, the Candoninae, are elucidated by using the B-splines method combined with multivariate statistical analysis.It is concluded that morphometric methods deserve to be included in the methodological toolbox of practicing ostracodologists as they can provide useful information in ecological and paleoecological research.
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4

Yasuhara, Moriaki, Yuanyuan Hong, Skye Yunshu Tian, Wing Ki Chong, Rachel Wai Ching Chu, Hisayo Okahashi, Markus Reuter, Werner E. Piller, and Mathias Harzhauser. "Early Miocene marine ostracodes from southwestern India: implications for their biogeography and the closure of the Tethyan Seaway." Journal of Paleontology 94, S80 (August 2020): 1–36. http://dx.doi.org/10.1017/jpa.2020.44.

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AbstractTwenty-six genera and 34 species of early Miocene Indian shallow-marine ostracodes were examined for taxonomy and paleobiogeography. A new genus Paractinocythereis and new species Costa ponticulocarinata were described. Early Miocene Indian ostracode fauna shows strong affinity to Eocene–Miocene Eastern and Western Tethyan ostracode faunas and Miocene–Recent Indo-Pacific ostracode fauna, supporting the Hopping Hotspot Hypothesis that the Tethyan biodiversity hotspot has shifted eastward through Arabia to Indo-Australian Archipelago (IAA) together with concomitant biogeographic shifts of the Tethyan elements. The result also indicated an inverse westward distributional shift in a genus. It is important to note that Paleogene and Miocene shallow marine ostracodes from the IAA region remain poorly investigated, and more fossil ostracode data are needed to better test the Hopping Hotspot Hypothesis.UUID: http://zoobank.org/d1e29249-8c5b-49bf-a47a-5f18e1fc4426
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5

Antonietto, Lucas S., Lisa E. Park Boush, Celina A. Suarez, Andrew R. C. Milner, and James I. Kirkland. "The ‘Last Hurrah of the Reigning Darwinulocopines’? Ostracoda (Arthropoda, Crustacea) from the Lower Jurassic Moenave Formation, Arizona and Utah, USA." Journal of Paleontology 92, no. 4 (April 26, 2018): 648–60. http://dx.doi.org/10.1017/jpa.2017.150.

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AbstractAn ostracode fauna is described from lacustrine sediments of the Hettangian, Lower Jurassic, Whitmore Point Member of the Moenave Formation. The Moenave is well known for its rich, Late Triassic?–Early Jurassic fossil record, which includes fossil fishes, stromatolites, ostracodes, spinicaudatans, and a diverse ichnofauna of invertebrates and vertebrates. Four ostracode species, all belonging to the suborder Darwinulocopina, were recovered from these sediments:Suchonellina globosa,S. stricta,Whipplella? sp. 1, andW.? sp. 2. The diversity and composition of the Whitmore Point Member ostracode fauna agree with previous interpretations about Lake Dixie and nearby paleoenvironments as shallow lakes inhabited by darwinulocopine species that survived the effects of the Central Atlantic Magmatic Province and the subsequent end-Triassic extinction and quickly recolonized these areas, thanks to asexual reproduction by parthenogenesis. The Lake Dixie region, in its geographical isolation, could represent the last episode of darwinulocopine dominance in nonmarine environments before the Late Jurassic diversification of the cypridocopine/cytherocopine modern ostracodes.
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6

Tanaka, Gengo. "Paleogeographical and paleoenvironmental significance of ostracodes from the Pennsylvanian Nagaiwa Formation, northeast Japan." Journal of Paleontology 97, S92 (March 23, 2023): 1–33. http://dx.doi.org/10.1017/jpa.2022.108.

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AbstractThe Early Pennsylvanian Nagaiwa Formation contains fossils such as corals, fusulinids, and ostracodes, and its age and depositional environments have been determined by fusulinids and sedimentology. In this study, I describe the ostracode assemblages from the Nagaiwa Formation. Moreover, I provide a reconstruction of the paleogeography of northeastern Japan during the Early Pennsylvanian by comparing this ostracode assemblage with assemblages from other regions during the same period. Thirty ostracode species, including 12 genera, have been identified, most of which are endemic species and 10 of which are new: Jordanites michinokuensis n. sp., Thuringobolbina ikeyai n. sp., Aechmina iwatensis n. sp., Pseudobythocypris asiatica n. sp., P. zipangu n. sp., P. siveteri n. sp., Platyrhomboides tohokuensis n. sp., P. japonica n. sp., Healdia ofunatensis n. sp., and H. rikutyuensis n. sp. Two of these species are also found in central Japan. The ostracodes from the Nagaiwa Formation are unique when compared with any other similarly aged assemblages.UUID: http://zoobank.org/c43f0787-4bb6-45d1-9c12-54a747c0b040
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7

Curry, B. Brandon. "Linking Ostracodes to Climate and Landscape." Paleontological Society Papers 9 (November 2003): 223–46. http://dx.doi.org/10.1017/s1089332600002229.

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Climatic effects on aquatic environments are an important factor in the ecology of ostracodes judging from their biogeography especially with respect to moisture balance and ecoregions (vegetation zones). The importance of climate in controlling ostracode distribution is underscored by major ecological changes indicated by co-stratigraphic changes in ostracode and pollen biozones throughout the Quaternary. Climatic interpretation of ostracode records are complicated, however, by several non-climatic factors, including basin shoaling, changes in water chemistry due to abrupt changes in the flux of groundwater, rivers, and streams to lakes and wetlands, and increasingly shortened water residence time in areas where precipitation exceeds evaporation due to erosion by basin overflow.
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8

Tinn, Oive, and Tõnu Meidla. "Ordovician ostracodes from the Komstad Limestone." Bulletin of the Geological Society of Denmark 46 (December 20, 1999): 25–30. http://dx.doi.org/10.37570/bgsd-1999-46-03.

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The results of a pilot study on late Arenigian ostracodes of Bornholm, Denmark, are reported. The hard thermally altered limestone was disintegrated with sodium hyposulphite, the yielded ostracode material is of satisfactory preservation. The ten identified genera include palaeocopes (Glossomorphites, Aulacopsis, Ctenentoma, Asteusloffia, Euprimites), eridostracans (Conchoprimitia), cytherelliformes (Unisulcopleura) and metacopes (Elliptocyprites, Longiscula, Microcheilinella and “Silenis”). The studied ostracode assemblage shows resemblance to that of the Central Baltoscandian Confacies Belt.
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9

Sugumaran, S., H. M. Nagaraj, and U. B. Mallikarjuna. "Ostracode fauna from the Patti Formation (Late Cretaceous) of Vridhachalam area, Tamil Nadu, India." Journal of Palaeosciences 46, no. (1-2) (December 31, 1997): 133–40. http://dx.doi.org/10.54991/jop.1997.1327.

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An ostracode fauna is recorded from the Patti Formation (Late Cretaceous) of Vridhachalam area, Tamil Nadu. The assemblage includes Bairdia pentagonalis, B. cretacea, B. supplanata, Macrocypris limburgensis and Paracypris limburgensis, which are typical of Maestrichtian age. The ostracodes show strong affinities with those recorded from the Ariyalur and Pondicherry areas, and those described from the type-Maestrichtian of Holland. The above assemblage and the presence of distinct Paleocene ostracodes in the overlying Pondicherry Formation throw light on K/T transition in the Vridhachalam area. The paper also discusses the stratigraphic distribution and zoogeographic affinities of the ostracode fauna with equivalent formations in India and the type areas elsewhere.
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10

Costanzo, Gary V., and Roger L. Kaesler. "Changes in Permian marine ostracode faunas during regression, Florena Shale, northeastern Kansas." Journal of Paleontology 61, no. 6 (November 1987): 1204–15. http://dx.doi.org/10.1017/s0022336000029577.

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The Florena Shale (Permian, Wolfcampian) of the Midcontinent of North America was deposited in a restricted marine basin. Shifting environments due to marine regression caused a gradual change in the ostracode fauna. Cluster analysis and ordination by nonmetric multidimensional scaling of data on ostracode relative abundances revealed three ostracode assemblages, each characteristic of a different environment. The Cryptobairdia seminalis assemblage from the lowest Florena Shale is characteristic of deeper water, offshore, marine environments with only minor influx of terrigenous mud. The Amphissites centronotus assemblage found above the C. seminalis assemblage occupied a similar environment, but with greater influx of terrigenous mud and intervals of increased turbidity. The Knightina texana assemblage occurs stratigraphically highest and probably represents a quiet-water, very shallow, nearshore, marine environment. Although protected from strong wave and current activity, the water mass was occasionally turbid.Species diversity of ostracodes is high both at the base of the Florena Shale, which was deposited in the most offshore position, and again at the top of the lower part of the Florena Shale, which was deposited nearer to the shore. In contrast to diversities of assemblages of ostracodes from similar environments in other stratigraphic units, the K. texana assemblage has an anomalously high diversity. This is due in part to time averaging of adjacent ostracode assemblages and a strong taphonomic overprint.
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Dissertations / Theses on the topic "Ostracode"

1

Zazzali, Sindbad. "Paléobiodiversité des ostracodes à la limite Permien moyen - Permien supérieur." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066111/document.

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Les ostracodes, microcrustacés (Arthropoda), sont relativement abondants dans les archives paléontologiques. Sensibles aux variations paléoenvironnementales, la composition des assemblages et leur diversité sont d’excellents marqueurs des changements qui affectent le benthos marin néritique. Leur diversité est connue pour être fortement affectée par la crise biologique marquant la limite Permien-Trias, mais leur histoire à la fin du Permien moyen reste peu documentée.Près de 10 Ma avant la limite Permien-Trias, à la fin du Permien moyen, un important épisode d’extinction intervient, préfigurant le déclin de la biodiversité à la fin du Paléozoïque.L’étude systématique des échantillons prélevés le long des coupes de Chaotian (province du Sichuan, Chine) et de Penglaitan (province du Guangxi, Chine) a permis l’identification de 115 espèces d’ostracodes, dont 7 nouvelles. Le travail réalisé sur ces coupes constitue la toute première étude des événements de la fin du Permien moyen et du début du Permien supérieur s’appuyant sur l’observation des assemblages d’ostracodes. L’état de conservation des carapaces d’ostracode, étudié lors de ce travail, enregistre les effets de la fin d’un épisode de régression et le début d’un épisode de transgression au sommet du Permien moyen à Penglaitan. Les résultats s’avèrent en accord avec les données lithologiques et paléontologiques présentées dans la littérature, un modèle de reconstitution paléoenvironnementale basé sur les données de préservation des ostracodes est proposé.Une analyse critique de la qualité du jeu de données a permis d’évaluer l’influence des biais d’échantillonnage sur la représentativité du matériel fossile dans les études sur la paléobiodiversité et la paléoécologie. Les biais peuvent être corrigés par un traitement méthodologique approprié qui rend valide la comparaison des données de biodiversité. La richesse générique et spécifique décroît sensiblement au cours du Capitanien. Le passage du Permien moyen au Permien supérieur enregistre une augmentation de la richesse spécifique, malgré une faible diversité générique. L’ordre des Palaeocopida apparait ici affecté par une baisse de diversité générique et spécifique au Wuchiapingien inférieur. Si ces résultats ne permettent pas pour l’iPermiannstant de caractériser un événement global de renouvellement des communautés d’ostracodes, l’étude de matériel fossile provenant d’autres régions du monde permettra de définir l’ampleur des phénomènes observés
Ostracods, microcrustaceans (Arthropoda), are quite abundant in the fossil record. Highly dependent to palaeoenvironmental conditions, their diversity and the assemblages’ composition are good indicators of changes affecting neritic marine benthos. Ostracods are known to be deeply affected by the Permian-Triassic crisis, but their history is poorly documented for the end of Middle Permian.About10 My before the Permian-Triassic boundary, the end of Middle Permian is characterized by a major extinction episode, which could be the first step of end-Palaeozoic biodiversity drop.Systematic study carried out on Chaotian section (Sichuan Province, P.R. China) and the Penglaitan section (Guangxi Province, P.R. China) samples allowed the identification of 115 species, including seven new species. The work carried out on these two sections provides the first study of end-Middle Permian extinction event, based on the observation of ostracod assemblages.Study of carapace preservation at Penglaitan section, highlighted the end of a regression phase and the beginning of a transgression phase at the top of Middle Permian. These results are relevant with lithologic and palaeontological data from literature. Thus, a palaeoenvironmental reconstruction model has been proposed, based on ostracod preservation data.An estimation of sampling bias consequences on fossil dataset representativeness in palaeobiodiversity and palaeoecology studies was realised. These biases could be corrected by an appropriate methodology allowing comparisons of biodiversity datum. Biodiversity data reveals a decrease of generic and specific richness during Capitanian. Specific richness increased passing the Middle-Upper Permian boundary. Palaeocopida order seems here affected by a generic and specific richness decline at basal Wuchiapingian. If these results do not allow for the time being to characterize a global ostracod turnover, further studies on material from other regions in the world will allow defining the extent of the observed phenomena
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2

Medeiros, Caio Gurgel de. "Ostracodes da Formação Solimões, Brasil : contribuição à bioestratigrafia do Neógeno da Amazônia." reponame:Repositório Institucional da UnB, 2017. http://repositorio.unb.br/handle/10482/23710.

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Dissertação (mestrado)—Universidade de Brasília, Instituto de Geociências, Programa de Pós-Graduação em Geologia, 2017.
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A Formação Solimões compreende uma sucessão siliciclástica intercalada por níveis linhíticos, carbonáticos e ferruginosos, distribuindo-se espacialmente pelo noroeste do Brasil, sudeste da Colômbia e nordeste do Peru. O intervalo sedimentar estudado restringe-se ao Mioceno, sendo atribuído a uma sedimentação fluvial à fluvio-lacustre. A análise do material recuperado da sondagem 1-AS-33-AM, proveniente do Município de Atalaia do Norte, Estado do Amazonas, permitiu a identificação de 12 espécies de ostracodes e um nível de ocorrência de foraminíferos: Cyprideis aff. amazonica, Cyprideis caraionae, Cyprideis aff. graciosa, Cyprideis inversa, Cyprideis machadoi, Cyprideis multiradiata, Cyprideis pebasae, Cyprideis simplex, Cyprideis sulcosigmoidalis, Alicenula olivencae, Rhadinocytherura amazonensis e Perissocytheridea sp. A. Apesar do endemismo das espécies analisadas, foi possível a proposição de um zoneamento bioestratigráfico local em que os 404,15 metros da sondagem foram compartimentados em três biozonas e uma subzona: Biozona Cyprideis caraionae, Biozona Cyprideis multiradiata e Biozona Cyprideis sulcosigmoidalis, além da Subzona Rhadinocytherura amazonensis, inserida na Biozona Cyprideis multiradiata, de posição intermediária. O nível de ocorrência de foraminíferos assinala um evento ecológico local em que se observa o desaparecimento de seis espécies de ostracodes e uma visível alteração no sistema deposicional. Além da análise bioestratigráfica, dados geofísicos e petrográficos foram utilizados na compreensão deste episódio paleoambiental, interpretado como uma mudança ambiental provocada por uma incursão marinha no sistema fluvio-lacustre que dominou a atual região da bacia hidrográfica do rio Amazonas durante Mioceno. A correlação cronoestratigráfica foi realizada com base nas propostas de zoneamento efetuadas com base no material coletado na região fronteiriça entre Brasil, Colômbia e Peru.
The Solimões Formation comprises a siliciclastic succession with intercalated lignite, carbonate and ferruginous levels, spatially distributed throughout the northwest region of Brazil, southeast of Colombia and northeast of Peru. The studied sedimentary interval is restricted to the Miocene, being attributed to fluvial to fluvio-lacustrine sedimentation. The analysis of the material recovered from the 1-AS-33-AM core-drilling, from the Municipality of Atalaia do Norte, State of Amazonas, allowed the identification of 12 species of ostracode and one level of occurrence of foraminifera: Cyprideis aff. amazonica, Cyprideis caraionae, Cyprideis aff. graciosa, Cyprideis inversa, Cyprideis machadoi, Cyprideis multiradiata, Cyprideis pebasae, Cyprideis simplex, Cyprideis sulcosigmoidalis, Alicenula olivencae, Rhadinocytherura amazonensis and Perissocytheridea sp. A. The endemism of the analyzed species allowed the proposal of a local biostratigraphic zonation, in which the 404.15 meters of the core-drilling were compartmentalized in three biozones and one subzone: Cyprideis caraionae biozone, Cyprideis multiradiata biozone and Cyprideis sulcosigmoidalis biozone, in addition to the Rhadinocytherura amazonensis subzone, inserted in the Cyprideis multiradiata biozone, the intermediated one. The level of occurrence of foraminifera indicates a local ecological event in which the disappearance of six species of ostracods and a visible change in the depositional system are observed. In addition to the stratigraphic analysis, geophysical and petrographic data were used to recognize this palaeoenvironmental episode, interpreted as an environmental shift caused by a marine incursion into the fluvio-lacustrine system that dominated the region of the Amazon river basin during Miocene. The chronostratigraphic correlation was performed based on the zoning proposals made based on the material collected in the border region between Brazil, Colombia and Peru.
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3

Zazzali, Sindbad. "Paléobiodiversité des ostracodes à la limite Permien moyen - Permien supérieur." Electronic Thesis or Diss., Paris 6, 2016. http://www.theses.fr/2016PA066111.

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Les ostracodes, microcrustacés (Arthropoda), sont relativement abondants dans les archives paléontologiques. Sensibles aux variations paléoenvironnementales, la composition des assemblages et leur diversité sont d’excellents marqueurs des changements qui affectent le benthos marin néritique. Leur diversité est connue pour être fortement affectée par la crise biologique marquant la limite Permien-Trias, mais leur histoire à la fin du Permien moyen reste peu documentée.Près de 10 Ma avant la limite Permien-Trias, à la fin du Permien moyen, un important épisode d’extinction intervient, préfigurant le déclin de la biodiversité à la fin du Paléozoïque.L’étude systématique des échantillons prélevés le long des coupes de Chaotian (province du Sichuan, Chine) et de Penglaitan (province du Guangxi, Chine) a permis l’identification de 115 espèces d’ostracodes, dont 7 nouvelles. Le travail réalisé sur ces coupes constitue la toute première étude des événements de la fin du Permien moyen et du début du Permien supérieur s’appuyant sur l’observation des assemblages d’ostracodes. L’état de conservation des carapaces d’ostracode, étudié lors de ce travail, enregistre les effets de la fin d’un épisode de régression et le début d’un épisode de transgression au sommet du Permien moyen à Penglaitan. Les résultats s’avèrent en accord avec les données lithologiques et paléontologiques présentées dans la littérature, un modèle de reconstitution paléoenvironnementale basé sur les données de préservation des ostracodes est proposé.Une analyse critique de la qualité du jeu de données a permis d’évaluer l’influence des biais d’échantillonnage sur la représentativité du matériel fossile dans les études sur la paléobiodiversité et la paléoécologie. Les biais peuvent être corrigés par un traitement méthodologique approprié qui rend valide la comparaison des données de biodiversité. La richesse générique et spécifique décroît sensiblement au cours du Capitanien. Le passage du Permien moyen au Permien supérieur enregistre une augmentation de la richesse spécifique, malgré une faible diversité générique. L’ordre des Palaeocopida apparait ici affecté par une baisse de diversité générique et spécifique au Wuchiapingien inférieur. Si ces résultats ne permettent pas pour l’iPermiannstant de caractériser un événement global de renouvellement des communautés d’ostracodes, l’étude de matériel fossile provenant d’autres régions du monde permettra de définir l’ampleur des phénomènes observés
Ostracods, microcrustaceans (Arthropoda), are quite abundant in the fossil record. Highly dependent to palaeoenvironmental conditions, their diversity and the assemblages’ composition are good indicators of changes affecting neritic marine benthos. Ostracods are known to be deeply affected by the Permian-Triassic crisis, but their history is poorly documented for the end of Middle Permian.About10 My before the Permian-Triassic boundary, the end of Middle Permian is characterized by a major extinction episode, which could be the first step of end-Palaeozoic biodiversity drop.Systematic study carried out on Chaotian section (Sichuan Province, P.R. China) and the Penglaitan section (Guangxi Province, P.R. China) samples allowed the identification of 115 species, including seven new species. The work carried out on these two sections provides the first study of end-Middle Permian extinction event, based on the observation of ostracod assemblages.Study of carapace preservation at Penglaitan section, highlighted the end of a regression phase and the beginning of a transgression phase at the top of Middle Permian. These results are relevant with lithologic and palaeontological data from literature. Thus, a palaeoenvironmental reconstruction model has been proposed, based on ostracod preservation data.An estimation of sampling bias consequences on fossil dataset representativeness in palaeobiodiversity and palaeoecology studies was realised. These biases could be corrected by an appropriate methodology allowing comparisons of biodiversity datum. Biodiversity data reveals a decrease of generic and specific richness during Capitanian. Specific richness increased passing the Middle-Upper Permian boundary. Palaeocopida order seems here affected by a generic and specific richness decline at basal Wuchiapingian. If these results do not allow for the time being to characterize a global ostracod turnover, further studies on material from other regions in the world will allow defining the extent of the observed phenomena
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Gause, Austin. "Paleoenvironmental Reconstruction of Quaternary Saltville, Virginia, using Ostracode Autecology." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/etd/3783.

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The Saltville valley in southwestern Virginia is home to Quaternary localities containing paleontological and archaeological remains. Historically the valley has been mined for salt and the small lakes, ponds and springs along the valley floor have a brackish signature. A preliminary report on the site’s ostracode fauna suggested that the site’s water was not always saline. This study analyzed modern and Quaternary ostracodes to understand the valley’s hydrologic and chemical evolution. Sediments contained primarily freshwater species, including the environmentally sensitive Candona crogmaniana. The presence of Pelocypris tuberculatum and a new Fabaeformiscandona species throughout a vertical section spanning the latest Pleistocene and Holocene suggests that ephemeral pools were being fed by freshwater springs throughout the latest Quaternary. Climate ranges, estimated through species autecology and MOTR, reveal that the site’s mean annual temperature was between 0 - 19.1℃. Ostracode salinity tolerances suggest that the site was fresh during the sampled record.
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Michelson, Andrew V. "Ecological, Taphonomic, and Paleoecological Dynamics of an Ostracode Metacommunity." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1341597923.

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Ferdinando, Darren. "Ostracode and foraminiferal taxonomy and palaeoecology of the Fossil Cliff Member of the Holmwood Shale, northern Perth Basin, Western Australia." University of Western Australia. Dept. of Geology and Geophysics, 2001. http://theses.library.uwa.edu.au/adt-WU2003.0019.

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The Sakmarian (Cisuralian, Permian) Fossil Cliff Member of the Holmwood Shale is situated in the northern Perth Basin, Western Australia, and consists of alternating beds of shale and silty calcarenite forming three parasequences. Within this member a diverse fauna of ostracodes and foraminifera are present. During the Cisuralian the northern Perth Basin formed part of the Gondwanan supercontinent and was linked to Greater India via an epeiric sea that opened to the north. The ostracode fauna is restricted to the calcareous beds of the member and consists of a diverse benthic fauna comprising 31 new species and 13 previously recorded species. Species from the Healdioidea, Bairdioidea, Youngielloidea, and Thlipsuroidea dominate the assemblage and suggest a normal-marine environment during the period represented by the calcareous beds, with an overall shallowing trend up the sequence. The fauna shows some similarity to faunas from the Tethyan deposits of North America and the Boreal deposits of Russia during the Late Carboniferous and Cisuralian. Twenty-eight species of foraminifera were recorded from the Fossil Cliff Member and underlying Holmwood Shale and comprise two distinct faunas, an agglutinated benthic foraminiferal fauna found within the shale beds and a calcareous benthic foraminiferal fauna present in the calcarenite units. The agglutinated foraminifera are inferred to represent deposition in dysoxic to suboxic (0.1-1.5 mL/LO2;), poorly circulated bottom waters below wave base. The calcareous foraminifera are inferred to represent deposition in normal-marine conditions. Both foraminiferal assemblages show a shallowing trend in their distribution that matches the trend identified in the ostracode fauna. Based upon the palaeoecology of the ostracode and foraminiferal faunas, the depositional environment for the Fossil Cliff Member is inferred to have been within shallow water in an epeiric basin during an overall marine regression that is overprinted by eustatic and isostatic oscillations resulting from deglaciation that occurred during the early Sakmarian (Cisuralian). These sea-level oscillations raised and lowered the oxic surface waters of the epeiric sea above and below the substrate resulting in a sparse agglutinated foraminiferal fauna or an abundant and diverse ostracode and calcareous foraminiferal fauna respectively.
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Orr, Robert James. "Upper Ordovician Ostracodes from Portrane, eastern Ireland." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317101.

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Barili, Giovani Manica. "SisAC - Sistema de Auxílio à Classificação. Estudo de caso: Ostracode." Universidade do Vale do Rio dos Sinos, 2011. http://www.repositorio.jesuita.org.br/handle/UNISINOS/4565.

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CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
O constante aumento no volume de informações em diversas áreas do conhecimento, via produção de material bibliográfico, multimídia e web, fruto dos avanços de pesquisas e estudos científicos, tem gerado um problema que é o gerenciamento e integração da informação de diferentes fontes. Com isso, a busca desses conhecimentos acaba tornando-se complexa e custosa, visto o volume de informações em alguns domínios de conhecimento. No entanto, esse conhecimento é de grande importância aos especialistas para raciocinar e chegar a conclusões que são utilizadas em tomadas de decisão ou como meio de solucionar problemas do domínio. Com base nessas necessidades, essa dissertação propõe um sistema de auxílio à classificação que tem como meta, oferecer funcionalidades que permitam aos usuários especialistas realizar a manutenção de informações de um domínio na base de conhecimento e a disseminação dela entre os usuários do sistema, por meio de consultas e/ou sugestões acerca do conhecimento resultante. Onde os resultados apresentados pelo sistema, gerados por meio de um motor de inferência, são baseados em Sistemas Especialistas, que busca construir raciocínios a partir de informações que o usuário possui sobre as observações do cenário do domínio. Juntamente com o sistema de inferência é proposto a associação de imagens relacionadas ao conhecimento, como forma de ilustrar as informações e descrições, e algoritmos de Processamento de Imagens para a redução da subjetividade nos casos de dúvida em relação às características visuais do estudo de caso, visto a falta de definições discretas de algumas informações que descrevem o conhecimento. Como estudo de caso para demonstrar a aplicabilidade do sistema proposto, o trabalho foi focado no domínio da paleontologia, mais especificamente na classificação de espécies de Ostracodes, organismos que representam grande importância para a identificação de fontes petrolíferas. Como resultado do trabalho obteve-se um sistema robusto e genérico, permitindo o armazenando de um grande volume de informações, separado pela área do conhecimento e subdividido por domínios de trabalho. Avaliações realizadas com usuários demonstram a efetividade da ferramenta e apontaram para a evolução de funcionalidades.
The constant increase in the volume of information of several areas of knowledge, through the production of bibliographic, multimedia and web material, is a result of advancements of research and scientific studies, and has led to issues regarding the management and integration of it. Therefore, the search for this knowledge becomes complex and difficult, considering the amount of information in some domains. However, this knowledge shows great importance to experts, who can analyze this information and use it to reach conclusions that are used in decision making or as a way for solving specific problems. Based on these requirements, this dissertation proposes a system to aid classification task, aiming to provide functionalities that allow the expert to maintain domain information in a knowledge base. Also, it is possible to disseminate this information to the others users through searches and/or suggestions, presenting information about the resulting knowledge. The results presented by the system are generated by an inference engine based on Expert Systems, which seeks to produce reasoning from users information about the domain. Along with the inference system is proposed a combination of images related to the knowledge as a way of illustrating the information and descriptions. Also, Image Processing algorithms are employed to reduce subjectivity in cases of uncertainty, regarding the visual characteristics of the case of study, considering the lack of discrete definitions for some information that describe the knowledge. A system was proposed for integrating the Expert Systems and Image Processing techniques. As a way to demonstrate the system applicability, a pertinent problem of paleontology domain focused in classification of Ostracodes species, which have great importance to petroleum exploration, was developed. The system was validated with users and experts that highlight its contribution: able to concentrate and store a big volume of information of many domains, incorporating support decision by image processing, and to be precise to map the expert knowledge. The experts cited as a major contribution that the system represents an application destined to inexperienced users, like students and novice researchers, used in the learning/training process.
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Somasundaram, Ramanathan, and Ramanathan Somasundaram. "Ostracode Taphonomy from Modern Shell Beds in Lake Tanganyika, East Africa." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/626607.

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Lake Tanganyika (LT), in the East African Rift, contains extensive shell beds that are noteworthy because the gastropods composing most of the LT shell beds are absent from the living in-situ assemblages of organisms hosted by the shell bed substrate. Understanding the geologic and biologic processes that formed these beds has the potential to improve our understanding of fossil shell beds in East Africa. The shell beds may also record recent lake-wide environmental change from climate or watershed impacts, which may be evident through community and taphonomic changes in the populations of shelly invertebrates and so the research seeks to examine whether shell bed substrates have experienced significant anthropogenic impacts that have altered the living assemblages. We investigated total abundance and taphonomic properties of ostracode fossils from shell beds at two sites in LT, one near the Luiche River Delta (a highly deforested site along the northern Tanzanian coast) and another near the Mahale Mountains National Park, an area of substantially lower human population density, 157 km to the south of the Luiche site. In laymen terms, ostracods are microscopic crustaceans that thrive in lacustrine environments and serve as very good indicators for past paleo-environmental and paleochemical reconstructions (Cohen, Nielsen 1986). We studied ostracode assemblage because of its sensitivity to chemical and physical changes in the environment. Ostracods indicate changes in shell beds. The analysis was done by sampling each site along 8 depth transects at the Luiche site and 7 transects at the Mahale site at water depths of 3, 6, 9, 12, 15, 20, 30, 40, 50, and 60 meters. We analyzed total abundance, %valves vs. carapace, % adult vs. juvenile, % carbonate coated, reduction stained, oxidation stained, and %broken vs intact valves for ostracode shells. Results of LT show that there is a decrease in proportion of broken valves, slight decrease in carbonate staining, and an increase in reduction staining and proportion of whole carapaces with increasing water depth. Results of MT show that there is a decrease in broken valves and whole carapaces and an increase in adults, carbonate coated and reduction stained ostracodes with depth. The implications of this study towards paleo-limnology is that the pattern and post-mortem alterations record environmental conditions in shell bed area which can be used to further research in the study of ostracods and environmental changes.
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Trubee, Kenton J. "Ostracode community response to anthropogenic modification of estuaries in southwestern Florida." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1366807735.

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Books on the topic "Ostracode"

1

M, Cronin Thomas, and Geological Survey (U.S.), eds. Modern Arctic Podocopid Ostracode Database. [Denver, CO]: U.S. Geological Survey, 1991.

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Krontrovitz, Mervin. Induced color in ostracode shells: An experimental study. Lawrence, KS: University of Kansas Paleontological Institute, 1992.

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Society, Paleontological, and Geological Society of America. Meeting, eds. Bridging the gap: Trends in the ostracode biological and geological sciences. [New Haven, CT]: Paleontological Society, 2003.

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Brouwers, Elisabeth M. Systematic paleontology of quaternary ostracode assemblages from the Gulf of Alaska. [Reston, Va.?]: Dept. of the Interior, U.S. Geological Survey, 1990.

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Brouwers, Elisabeth M. Systematic paleontology of Quaternary ostracode assemblages from the Gulf of Alaska. Washington: U.S. G.P.O., 1990.

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Farah, Fatmi S., and Geological Survey (U.S.), eds. Late Paleocene-early Eocene ostracode assemblages from core UAJ- 1, Meting-Jhimpir coal field, Sindh Province, Pakistan. [Denver, CO]: U.S. Dept. of the Interior, U.S. Geological Survey, 1992.

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Carter, Claire. Seasonal variations in environmental conditions of fresh-water ostracode habitats, San Francisco Peninsula, California. Menlo Park, CA: U.S. Geological Survey, 1992.

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Carter, Claire. Seasonal variations in environmental conditions of fresh-water ostracode habitats, San Francisco Peninsula, California. Menlo Park, CA: U.S. Geological Survey, 1992.

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Carter, Claire. Seasonal variations in environmental conditions of fresh-water ostracode habitats, San Francisco Peninsula, California. Menlo Park, CA: U.S. Geological Survey, 1992.

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Geological Survey (U.S.), ed. Pliocene paleoecologic reconstructions based on ostracode assemblages from the Sagavanirktok and Gubik Formations, Alaska north slope. [Denver, CO]: U.S. Dept. of the Interior, U.S. Geological Survey, 1992.

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Book chapters on the topic "Ostracode"

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Van Harten, D. "Ostracode options in sea-level studies." In Sea-Level Research, 489–501. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4215-8_17.

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Ito, Emi. "Mg/Ca, Sr/Ca, δ18O and δ13C chemistry of Quaternary lacustrine ostracode shells from the North American continental interior." In The Ostracoda: Applications in Quaternary Research, 267–78. Washington, D. C.: American Geophysical Union, 2002. http://dx.doi.org/10.1029/131gm14.

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Holmes, Jonathan A. "Ostracoda." In Tracking Environmental Change Using Lake Sediments, 125–51. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/0-306-47671-1_7.

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Jain, Sreepat. "Ostracods." In Fundamentals of Invertebrate Palaeontology, 143–70. New Delhi: Springer India, 2019. http://dx.doi.org/10.1007/978-81-322-3962-8_8.

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Robinson, J. E. "Ostracoda." In Late Quaternary Environmental Change in North-west Europe: Excavations at Holywell Coombe, South-east England, 242–53. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-4908-2_11.

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Armstrong, Howard A., and Martin D. Brasier. "Ostracods." In Microfossils, 219–48. Malden, MA USA: Blackwell Publishing, 2013. http://dx.doi.org/10.1002/9781118685440.ch20.

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McKenzie, K. G., G. Benassi, and I. Ferrari. "Ostracods." In Atlas of Marine Zooplankton Straits of Magellan, 157–239. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-60340-2_6.

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Smith, Robin J., and Koen Martens. "The ontogeny of the cypridid ostracod Eucypris virens (Jurine, 1820) (Crustacea, Ostracoda)." In Evolutionary Biology and Ecology of Ostracoda, 31–63. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-1508-9_3.

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Ax, Peter. "Thecostraca — Ostracoda." In Multicellular Animals, 191. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-10396-8_54.

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De Deckker, Patrick. "Ostracod palaeoecology." In The Ostracoda: Applications in Quaternary Research, 121–34. Washington, D. C.: American Geophysical Union, 2002. http://dx.doi.org/10.1029/131gm06.

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Conference papers on the topic "Ostracode"

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Hall, Christine, Mary L. Droser, and Sandra Kirtland Turner. "OSTRACODE BODY SIZE CHANGES ACROSS AN EOCENE HYPERTHERMAL EVENT." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-358067.

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Knox, Larry W., and Kayla R. Hillis. "RELATIVELY INEXPENSIVE HIGH-RESOLUTION COMPUTED TOMOGRAPHY OF A PERMIAN OSTRACODE SPECIES." In 67th Annual Southeastern GSA Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018se-312829.

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Shaw, Jack O., Gene Hunt, and David Sunderlin. "ASSESSING CHANGES IN SEXUAL DIMORPHISM IN OSTRACODE LINEAGES DURING THE LATE CRETACEOUS." In Joint 52nd Northeastern Annual Section and 51st North-Central Annual GSA Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017ne-290511.

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Hunt, Gene, Maria João Fernandes Martins, T. Markham Puckett, Jack O. Shaw, Rowan Lockwood, and John P. Swaddle. "SEXUAL DIMORPHISM IS GENERALLY STABLE OVER THE LIFETIME OF FOSSIL OSTRACODE SPECIES." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-306412.

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Gemery, Laura. "APPLICATIONS OF THE ARCTIC OSTRACODE DATABASE (AOD) TO SPECIES ECOLOGY AND PALEOENVIRONMENTAL RECONSTRUCTIONS." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-300147.

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Hodelka, Bailee N., Michael M. McGlue, Manuel R. Palacios-Fest, and Susan H. Zimmerman. "PRELIMINARY LATE QUATERNARY OSTRACODE STRATIGRAPHY AND PALEOECOLOGY FROM MONO LAKE (EASTERN SIERRA NEVADA)." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-358164.

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Knox, Larry W. "HETEROCHRONY (PERAMORPHOSIS, PREDISPLACEMENT) IN A HOLLINELLID OSTRACODE SPECIES FROM THE PERMO-CARBONIFEROUS OF KANSAS." In 67th Annual Southeastern GSA Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018se-312327.

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Hall, Christine M. S., Sandra Kirtland Turner, and Mary L. Droser. "CHANGING NORTH ATLANTIC OSTRACODE ABUNDANCE AND DIVERSITY IN RESPONSE TO AN EOCENE HYPERTHERMAL EVENT." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-324007.

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Hall, Christine M. S., Sandra Kirtland Turner, and Mary L. Droser. "OSTRACODE RESPONSE TO CHANGING ENVIRONMENTS DURING EOCENE THERMAL MAXIMUM 2 IN THE EQUATORIAL ATLANTIC." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-306907.

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Fernandes Martins, Maria João, Gene Hunt, Carmi Milagros Thompson, Rowan Lockwood, and John P. Swaddle. "DID SEXUAL SELECTION HINDER SURVIVAL OF OSTRACODE SPECIES THROUGH THE K/PG MASS EXTINCTION?" In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-306957.

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Reports on the topic "Ostracode"

1

Rodriques, C. G. Ostracode stratigraphy of Lake Winnipeg sediments. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/207516.

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Banerjee, I., and I. Raychaudhuri. Paleoenvironmental significance of biota of the Ostracode zone (Mannville Group) in south-central Alberta. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1996. http://dx.doi.org/10.4095/207880.

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Riediger, C. L., and I. Banerjee. Rock-eval/TOC data from the Lower Cretaceous Ostracode Zone (Mannville Group), Calcareous Member (Gladstone Formation) and Moosebar Formation, Alberta, Western Canada Sedimentary Basin. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/184203.

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Copeland, M. J. Ordovician Ostracoda from southern Baffin Island, Nunavut. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/211848.

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Copeland, M. J. Early Silurian ostracodes from southeastern Quebec and northern New Brunswick. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/193321.

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Copeland, M. J. New occurrences of kolmodinia martinsson [ostracoda] from the silurian [wenlock] of the. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/120254.

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Copeland, M. J. Silicified Upper Ordovician-Lower Silurian ostracodes from the Avalanche Lake area, southwestern District of Mackenzie. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1989. http://dx.doi.org/10.4095/127317.

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Copeland, M. J. Middle Devonian (Givetian, Hamilton Group) Ostracoda in two diamond drill cores from Lambton County, southwestern Ontario. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1999. http://dx.doi.org/10.4095/210869.

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Copeland, M. J. Bullaluta Kindlei N. Gen., N. Sp. [Ostracoda, Archaeocopida] From Zone 5 [Late Cambrian, CedariaCrepicepha of the Cow Head Group, western Newfoundland. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/120785.

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Ascoli, P. Mesozoic-Cenozoic foraminiferal, ostracod and calpionellid zonation of the north Atlantic margin of North America: Georges Bank-Scotian basins and northeastern Grand Banks [Jeanne d'Arc, Carson and Flemish Pass basins] and biostratigraphic correlation of 51 wells. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1988. http://dx.doi.org/10.4095/130500.

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