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191 results for “early Oligocene”
Figure 3 in New remains of a gavialoid crocodilian from the late Oligocene-early Miocene of the Pirabas Formation, Brazil
Figure 3. Reconstruction of the mandibular symphysis of Gavialoid indet., MPEG 1130-V.
Figure 4 in New remains of a gavialoid crocodilian from the late Oligocene-early Miocene of the Pirabas Formation, Brazil
Figure 4. Gavialoid indet., right lateral portion of mandible, MPEG 1010-V, in lateral view.
Figure 3. Plesiomeryx cadurcensis. A & B, occlusal view. A, left P2 in New data on the Cainotheriidae (Mammalia, Artiodactyla) from the early Oligocene of south-western France
Figure 3. Plesiomeryx cadurcensis. A & B, occlusal view. A, left P2/-M3/ (ABL1 1452). B, right C-M/3 (MGT 104). P. huerzeleri. C & D, occlusal view. C, right P2/-M3/ (MGT 3209). D, left P/2-M/3 (MGT 3187). Scale bar = 1 mm.
Data from: An Early Oligocene age for the oldest known monkeys and rodents of South America
<p>The Santa Rosa fossil locality in eastern Perú produced the first Paleogene vertebrate fauna from the Amazon Basin, including the oldest known monkeys from South America. This diverse paleofauna was originally assigned an Eocene age, based largely on the stage of evolution of the site's caviomorph rodents and marsupials. Here we present new detrital zircon dates that indicate that the maximum composite age of Santa Rosa is 29.6±0.8 Ma (Lower Oligocene), although several zircons from Santa Rosa date to the Upper Oligocene. The first appearance datum for Caviomorpha in South America is purported to be the CTA-27 site in the Contamana region of Perú, which is hypothesized to be ~41 Ma (Middle Eocene) in age. However, the presence of the same caviomorph species and/or genera<i> </i>at both CTA-27 and at Santa Rosa is now difficult to reconcile with a >11 Myr age difference. To further test the Middle Eocene age estimate for CTA-27, we ran multiple Bayesian tip-dating analyses of Caviomorpha, treating the ages of all Paleogene species from Perú as unknown. These analyses produced mean age estimates for Santa Rosa that overlap with the maximum 29.6±0.8 Ma composite date provided by detrital zircons, but predict that CTA-27 is much younger than currently thought (~31-30 Ma). We conclude that the ~41 Ma age proposed for CTA-27 is incorrect and that there are currently no compelling Eocene records of either rodents or primates in the known fossil record of South America.</p>
Data from: The early history of Annonaceae (Magnoliales) in Southeast Asia suggests floristic exchange between India and Pan-Indochina by the late Oligocene
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Data from: An Early Oligocene age for the oldest known monkeys and rodents of South America
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Identification of the Oligocene to early Miocene loricariid catfish †Taubateia paraiba as a member of the Rhinelepinae: List of taxa for which comparative CT-data were examined
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Fig. 2 in New skeleton from the early Oligocene of Germany indicates a stem-group position of diomedeoidid birds
Fig. 2. Map of the immediate surroundings of the Rheinweiler locality.
Southern High Latitude Temperature Proxies from the Late Eocene and Early Oligocene
<p>Dataset of proxy records utilized in Comparison of Southern High Latitude Temperature Proxies to Model Outputs from the Eocene-Oligocene Transition by Tibbett et al., 2022</p>
Fig. 4 in Multigene fossil-calibrated analysis of the African lampeyes (Cyprinodontoidei: Procatopodidae) reveals an early Oligocene origin and Neogene diversification driven by palaeogeographic and palaeoclimatic events
Fig. 4 Estimated distribution extension of Procatopodidae genera based on information present in Wildekamp et al. (1986), Wildekamp (1995), and Wildekamp (2004)
Figure 5. Gavialoid indet., MPEG 608-V in New remains of a gavialoid crocodilian from the late Oligocene-early Miocene of the Pirabas Formation, Brazil
Figure 5. Gavialoid indet., MPEG 608-V. Anterior and lateroventral view (A, A1, respectively) of the articular region of a left mandible; isolated tooth, MPEG 116-V (B); isolated tooth, MPEG 1129-V (C). MPEG 609-V; right lateral view of incomplete fifth cervical vertebra, MPEG 609-V (D). Abbreviations: gf, fossa glenoid; s, surangular; sas, surangular-articular suture; rap, retroarticular process.
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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.