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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.
Torres et al. (2025) report the discovery of a new, nearly complete skull of Vegavis iaai, interpret its morphology as supporting phylogenetic affinities of Vegavis with Anseriformes, and report evidence of the presence of a feeding apparatus different from those of extant members of Anseriformes but similar to those of extant birds that ...
[1] [2] In some archosaur species, the opening has closed but its location is still marked by a depression, or fossa, on the surface of the skull called the antorbital fossa. The antorbital fenestra houses a paranasal sinus that is confluent with the adjacent nasal capsule. [ 3 ]
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 ...
Osteoderms structure is generally one of the most useful traits for inferring aetosaur relations more precisely. Among other archosaurs, aetosaurs are most closely related to Revueltosaurus , a small reptile originally known from teeth mistakenly referred to herbivorous dinosaurs.
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]
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. [311]
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 ...