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Modern crocodilians' hearts are 4-chambered, but are smaller relative to body size and run at lower pressure than those of modern birds and mammals. They also have a pulmonary bypass, which makes them functionally 3-chambered when under water, conserving oxygen. a secondary palate, which allows the animal to eat and breathe at the same time.
The "classic" definition of archosaur utilized prior to the widespread use of cladistics is now roughly equivalent to the clade Archosauriformes. [5] Archosaurus is still considered the oldest undisputed archosauriform, as well as one of the few valid members of the family Proterosuchidae .
Paterna & Cau (2022) describe new carcharodontosaurid cranial material from the Kem Kem Group , including one partial maxilla with a morphology distinct from that of Carcharodontosaurus saharicus, with a body size as comparable to the largest carcharodontosaurids, argue that Sauroniops pachytholus is distinct from Carcharodontosaurus, and ...
A study on the nature of the observed variation in morphology and size of skulls of Bagaceratops rozhdestvenskyi is published online by Czepiński (2019), who considers the species Gobiceratops minutus, Lamaceratops tereschenkoi, Platyceratops tatarinovi and Magnirostris dodsoni to be junior synonyms of B. rozhdestvenskyi.
“That these tracks of southern Africa, dating to the Late Triassic, so strongly resemble Cenozoic and modern bird tracks substantiates the converging pedal morphology of Late Mesozoic archosaurs ...
Revision of the fossil material of Cenomanian crocodyliforms from the Arlington Archosaur Site (Woodbine Group; Texas, United States), providing evidence of the presence of at least five taxa with different snout shapes and body size which might be related to niche partitioning, is published by Adams, Drumheller & Noto (2023). [45]
An assemblage of over 100 theropod footprints of various size and morphology is described from the Lower Jurassic Fengjiahe Formation (China) by Li et al. (2021), representing the track site with the largest number of theropod footprints in Yunnan reported to date.
The morphology and evolution of the pelvis in pterosaurs is reviewed by Hyder et al. (2014), who also find significant differences that correlate well with several pterosaur clades. [146] Bantim et al. (2014) analyze the skull variation and the shape of the sagittal premaxillary crests in anhanguerid pterosaurs using bidimensional geometric ...