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73 results for “paleobiogeography”
FIGURE 2 in Volutidae (Mollusca: Gastropoda) of the Lakhra Formation (Earliest Eocene, Sindh, Pakistan): systematics, biostratigraphy and paleobiogeography
FIGURE 2. Volutids embedded in the bioclastic sandstone of the Lakhra Formation (stn 4, sample 2014). A. A specimen of Lyrischapa vredenburgi sp. nov. showing only a part of its first whorls. The white arrow indicates the location of the protoconch. B. A specimen of Lyrischapa blanfordi (Vredenburg, 1923) partially (base and columellar folds) embedded in the sedimentary matrix. Scale bars: 50 mm.
Data from: Revision of Ordovician chitinozoan Lagenochitina esthonica sensu lato: morphometrics, biostratigraphy and paleobiogeography
<p>Data presented here contribute to the results documented in the paper: Liang, Y., Nõlvak, J., Xu, H., Chen, Y. and Hints, O. (2021) Revision of Ordovician chitinozoan <i>Lagenochitina esthonica sensu lato</i>: morphometrics, biostratigraphy and paleobiogeography. Journal of Paleontology, in press.</p> <p>Two datasets are included, one is Supplemental Data 1 cited in Liang et al. (2021) which contains detailed information of the occurrence data of previously published <i>Lagenochitina esthonica</i>. The other is Supplemental Data 2 cited in the paper which contains two sheets. One sheet named as "Original data"and it presents the original raw data of the measurements of <i>Lagenochitina esthonica</i> specimens obtained at the Jägala, Kaldase, Kaugatuma and Baldone sections, eastern Baltica. The other named as "Two forms", which divided the raw data into two groups for further statistical study.</p> <p>Statistical morphometric study based on the measurements of <i>L. esthonica</i> indicates that two varieties could be recognized: a relatively short form with a test length around 400 μm and a L/Dp* ratio around 1.4–3.0, and a slender form usually longer than 600 μm in length with a L/Dp* ratio around 2.0–7.0.</p> <p>Stratigraphic and geographic distributions based on available occurrence data suggest that the short form occurs in the upper Tremadocian to lower Dapingian, whereas the slender form is mostly reported from the lower and middle Darriwilian. Both forms are identified on Baltica; the short form has also been reported from Laurentia and South China, whereas the other is known also from Avalonia and Gondwana.</p> <p>The morphological distinction, together with differences in stratigraphic and spatial ranges, suggest that the two forms represent separate species: the original stout <i>L. esthonica</i>, based on the morphology of the holotype, and the slender <i>L. megaesthonica</i> n. sp. described herein. The updated taxonomy enhances the stratigraphic and biogeographic usefulness of lagenochitinids globally.</p>
Diversification trajectories and paleobiogeography of Neogene chondrichthyans in Europe
<p>Despite the rich fossil record of Neogene chondrichthyans (chimaeras, sharks, rays and skates) from Europe, little is known about the macroevolutionary processes that generated their current diversity and geographical distribution. We compiled 4,419 Neogene occurrences comprising 102 genera, 41 families and 12 orders from four European regions (Atlantic, Mediterranean, North Sea and Paratethys) and evaluated their diversification trajectories and paleobiogeographic patterns. In all analysed regions, we found that the generic richness increased during the early Miocene, then decreased sharply during the middle Miocene in the Paratethys and moderately during the late Miocene and Pliocene in the Mediterranean and North seas. Origination rates display the most significant pulses in the early Miocene in all regions. Extinction rate pulses varied across regions, with the Paratethys displaying the most significant pulses during the late Miocene and the Mediterranean and North seas during the late Miocene and early Pliocene. Overall, up to 27% and 56% of the European Neogene genera are now globally and regionally extinct, respectively. The observed pulses of origination and extinction in the different regions coincide with warming and cooling events that occurred during the Neogene globally and regionally. Our study reveals complex diversity dynamics of Neogene chondrichthyans from Europe and their distinct biogeographic composition despite the multiple marine passages that connected the different marine regions during this time.</p>
Diversification trajectories and paleobiogeography of Neogene chondrichthyans in Europe
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Paleobiogeography, paleoecology, diversity, and speciation patterns in the Eublastoidea (Blastozoa: Echinodermata)
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Data from: Revision of Ordovician chitinozoan Lagenochitina esthonica sensu lato: morphometrics, biostratigraphy and paleobiogeography
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FIG. 4. — A in First report of Early Eocene Decapods in Morocco: description of a new genus and a new species of Carpiliidae (Decapoda: Brachyura) with remarks on its paleobiogeography
FIG. 4. — A, Braggicarpilius marginatus Beschin, Busulini & Tessier, 2015, holotype MCZ 3998, from the Ypresian (early Eocene) of Vestenanova (NE Italy) (digitally cut out of the matrix); B, Carpilius petreus Beschin, Busulini, De Angeli & Tessier, 2007, holotype MCZ 1809, from the Ypresian of Contrada Gecchelina (NE Italy) (digitally cut out of the matrix); C, D, Eocarpilius ortegai Artal & Van Bakel, 2018, topotype MGSB 77906a, from the Ilerdian (earlyYpresian) of Isábena (N Spain); C, frontal view; D, dorsal view; E, F, Oscacarpilius rotundus Artal & Van Bakel, 2018, from the Ilerdian of Isábena (N Spain); E, topotype MGSB 77905b; F, topotype MGSB 77905a. Scale bars: A, 5 mm; B-F, 10 mm.
FIG. 5 in First report of Early Eocene Decapods in Morocco: description of a new genus and a new species of Carpiliidae (Decapoda: Brachyura) with remarks on its paleobiogeography
FIG. 5. — The paleogeographic map of the Tethys sea during the Ypresian (lower Eocene): 1, continental domain; 2, shallow marine domain; 3, deep marine domain, 4, oceanic crust boundary; 5, major thrust fault; 6, active subduction zone; 7, present-day coastlines; 8, Maurocarpilius binodosus n. gen., n. sp.; 9, Eocarpilius ortegai and Oscacarpilius rotundus; 10, Braggicarpilius marginatus and Carpilius petreus. This map also shows a hypothetical connection between the Tethys sea and the Bay of Biscay through the South Pyrenees. This is suggested by the spatial distribution of fossil carpiliids sites and imply a shallow marine corridor in the south of the Corso-Sardinian Block as also proposed by Colombo & Caus (1984). Adapted from Barrier et al. (2018).
FIG. 2 in First report of Early Eocene Decapods in Morocco: description of a new genus and a new species of Carpiliidae (Decapoda: Brachyura) with remarks on its paleobiogeography
FIG. 2. — Field photographs from the Jbel Talouit area: A, tilted strata of the Jbel Talouit outcropping in the Tourbict gorges. This shows the high degree of tectonic deformation within the sub-Atlas thrust belt; B, view of the Tamalout section on the northern face of the Jbel Talouit. The dot line corresponds to the limit between the Thanetian and Eocene sedimentary units. The white arrow shows the location of the Carpiliidae site; C, vertebrate bone fragments coming from the beds that overlies the Carpiliidae marls. Those beds are the lateral equivalent of those of the Aznag vertebrate site; D, in the white box is Maurocarpilius binodosus n. gen., n. sp. holotype, in situ, that is outcropping within the Eocene marls of the Ait Ouarhitane Formation.
FIG. 3. — Maurocarpilius binodosus n. gen., n in First report of Early Eocene Decapods in Morocco: description of a new genus and a new species of Carpiliidae (Decapoda: Brachyura) with remarks on its paleobiogeography
FIG. 3. — Maurocarpilius binodosus n. gen., n. sp., from the Ypresian (early Eocene) of Kelâa M'Gouna (Morocco):A-D, holotype ULB-IV-A(1a); A, dorsal view (digitally cut out of the matrix); B, frontal view; C, right lateral view; D, posterior view; E-H, paratype ULB-IV-A(1b); E, dorsal view; F, frontal view; G, posterior view; H, right lateral view; I, J, paratype ULB-IV-A(1c); I, dorsal view; J, frontal view. Arrows indicate the two anterolateral teeth distinctive of the species. Scale bar: 10 mm.
FIG. 1 in First report of Early Eocene Decapods in Morocco: description of a new genus and a new species of Carpiliidae (Decapoda: Brachyura) with remarks on its paleobiogeography
FIG. 1. — The geographical and geological contexts: A, location map of the Paleogene formations between Ouarzazate and Kelâa M'Gouna (Tabuce et al. 2005, modified); B, location of Tamalout paleontological site (Tabuce et al. 2005, modified); C, sedimentological section of the Tamalout site. 1, calcarenite; 2, sandstone; 3, bioclastic limestone; 4, gypsum; 5, marls; 6, urchins; 7, cephalopod nautiloids; 8, others molluscs; 9, vertebrates; 10, Maurocarpilius binodosus n. gen., n. sp.
FIGURE 2 in Late Cretaceous Elopomorpha (Actinopterygii: Teleostei) from the Mahajanga Basin of Madagascar and impacts on paleobiogeography
FIGURE 2. Albula sp. fossils from the Maevarano Formation. A-B, occlusal and lateral view of tooth plate (UA 11388). C-D, occlusal and ventral view of dentary (DMNH EPV. 136301). Scale bars equal 1 cm.
Elasmosaurid phylogeny and paleobiogeography, with a reappraisal of Aphrosaurus furlongi from the Maastrichtian of the Moreno Formation
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.