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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 .
A study on the morphology, preservation and taphonomy of the skin of Haestasaurus becklesii, and a review of sauropod skin morphology, is published by Pittman et al. (2022). [ 204 ] A study on the anatomy and phylogenetic affinities of Ligabuesaurus leanzai , based on data from new postcranial elements assigned to the holotype specimen and from ...
"Rauisuchia" is a paraphyletic group of mostly large and carnivorous Triassic archosaurs. [2] Rauisuchians are a category of archosaurs within a larger group called Pseudosuchia, which encompasses all archosaurs more closely related to crocodilians than to birds and other dinosaurs. First named in the 1940s, Rauisuchia was a name exclusive to ...
A study on the morphology of dorsal vertebrae of extant and fossil archosaurs, and on its implications for inferring lung structure in non-avian dinosauriform archosaurs, is published by Brocklehurst, Schachner & Sellers (2018). [1] [2]
“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 ...
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.
Gregory S. Paul inferred that Lagosuchus was one of the smallest Triassic archosaurs, with a weight of about 167 g, similar in size and ecology to a weasel or ferret. [9] Thomas Holtz estimated that Lagosuchus could have obtained a total length of 1.7 ft (51 cm) and a weight similar to that of a pigeon (50-500 g). [ 10 ]