Results 271 to 280 of about 512,344 (329)
Phylogenetic relationships of plesiadapiform-tarsiiform primates
, 1978 Leonard Krishtalka, Jeffrey H. Schwartz
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The Anatomical Record, EarlyView.We describe the functional anatomy of masticatory muscles in nine opossums, finding a generalized anatomical pattern with differences related to skull morphology. Variation in quantitative myological data and estimated bite force was mostly related to size, and the increase in bite force supports dietary diversification associated with size increase ...
Juann A. F. H. Abreu, Diego Astúa
wiley +1 more source
An Analysis of Hair Structure and Its Phylogenetic Implications among Heteromyid Rodents
, 1978 J. A. Homan, Hugh H. Genoways
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The Anatomical Record, EarlyView.Abstract Silesaurids (Archosauria: Dinosauriformes) are found in Middle to Upper Triassic deposits across Pangea, but few stratigraphic sections record the evolution of the group in one geographic area over millions of years. Here, we describe silesaurid remains from the oldest of the Upper Triassic stratigraphic sequence from the base of the Dockum ...
Frederick B. Tolchard +2 more
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The relationship between form and function of the carnivore mandible
The Anatomical Record, EarlyView.Abstract Dietary morphology diversified extensively in Carnivoraformes (living Carnivora and their stem relatives) during the Cenozoic (the last 66 million years) as they evolved to capture, handle, and process new animal and plant diets. We used 3D geometric morphometrics, mechanical advantage, and finite element analysis to test the evolutionary ...
Charles J. Salcido, P. David Polly
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Dissecting phylogenetic fuzzy weighting: theory and application in metacommunity phylogenetics
, 2016 L. Duarte +3 more
semanticscholar +1 more source
China shares fossil treasures with the world
The Anatomical Record, EarlyView.Abstract China has been a rich source of fossils for nearly a century, beginning with the discovery of so‐called Peking man (Sinanthropus pekinensis), known today as Homo erectus pekinensis in the mid 1920s. The first Chinese dinosaurs were described in 1929, the sauropod Helopus (now Euhelopus) and the ornithopod Tanius, described by the Swedish ...
Peter Dodson
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An overview of the postcranial osteology of caecilians (Gymnophiona, Lissamphibia)
The Anatomical Record, EarlyView.Abstract Caecilians comprise a relatively small (~220 species) group (Gymnophiona) of snake‐like or worm‐like, mostly tropical amphibians. Most adult caecilians are fossorial, although some species may live in aquatic or semi‐aquatic environments, either as larvae or adults.
Rodolfo Otávio Santos +2 more
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The Anatomical Record, EarlyView.Abstract Actinopterygii is a major extant vertebrate group, but limited data are available for its earliest members. Here we investigate the morphology of Devonian actinopterygians, focusing on the lower jaw. We use X‐ray computed tomography (XCT) to provide comprehensive descriptions of the mandibles of 19 species, which span the whole of the Devonian
Ben Igielman +11 more
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