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7 results for “sabertooth cat”
Distinct predatory behaviors in scimitar- and dirk-toothed sabertooth cats
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Data from: Evolution in the sabertooth cat, Smilodon fatalis, in response to Pleistocene climate change
The late Pleistocene was a time of environmental change, culminating in an extinction event. Few fossil localities record a temporal series of carnivore fossil populations from this interesting interval as well as Rancho La Brea (RLB). We analyzed mandibles of Smilodon fatalis from RLB using 2D geometric morphometrics to examine if, and how, mandibular shape changes through time. S. fatalis shows mandibular evolution with oscillations between a small, ancestral-type morph in pits 77 (≈37 Kybp) and 2051 (≈26 Kybp), a larger, more derived morph in pits 91 (≈28 Kybp) and 61-67 (≈13.6 Kybp), and an intermediate morph from pit 13 (≈17.7 Kybp). These oscillations end in pit 61-67, where Smilodon exhibits its greatest body size, widest gape, and lowest bite forces. Additionally, variation is lowest in pit 61-67, which was deposited concurrent with the Bølling-Allerød warming event, which may have important implications for the timing or conditions during the extinction event. Contra to a temporal Bergmann's rule, such rapid warming events appear to be correlated with larger, derived, morphologies while static, cooler, climates correlate with gracile, ancestral morphologies.
Data from: Eurasian wanderer: An island sabertoothed cat (Felidae, Machairodontinae) in the Far East
<p><span>Machairodontinae</span><span>, including the famous <em>Smilodon</em> and <em>Homotherium</em>, was an iconic Pleistocene carnivore lineage that occupied a critical ecological paleo-niche and is thought to have had a profound impact on Ice Age ecosystem structure. Recent ancient molecular studies on <em>Homotherium</em> suggest a wider distribution than inferred from the fossil record, highlighting a need for additional fieldwork, fossil collection, and research in understudied geographic regions. After the original publication 80 years ago that identified a Pleistocene carnivoran fossil as <em>Felis</em> sp. in Taiwan, here we revise its identification and demonstrate the presence of the large machairodontine cat, cf. <em>Homotherium</em> sp., in the Pleistocene of Taiwan, suggesting the easternmost occurrence of this lineage in Eurasia. Our results also exemplify the importance of fossil curation and in-depth research to reveal regional hidden diversity and lost ecosystem structure for understanding faunal turnover and the origin of modern biodiversity.</span></p>
Data from: Evolution in the sabertooth cat, Smilodon fatalis, in response to Pleistocene climate change
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Data from: Eurasian wanderer: An island sabertoothed cat (Felidae, Machairodontinae) in the Far East
Open the record for dataset details and reuse information.
Variation in prey availability over time shaped the extinction dynamics of sabertoothed cats
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Variation in prey availability over time shaped the extinction dynamics of sabertoothed cats
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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.