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Older definitions of the group Archosauria rely on shared morphological characteristics, such as an antorbital fenestra in the skull, serrated teeth, and an upright stance. Some extinct reptiles, such as proterosuchids and euparkeriids , also possessed these features yet originated prior to the split between the crocodilian and bird lineages.
An antorbital fenestra (plural: fenestrae) is an opening in the skull that is in front of the eye sockets. This skull character is largely associated with archosauriforms, first appearing during the Triassic Period. Among extant archosaurs, birds still possess antorbital fenestrae, whereas crocodylians have lost them. The loss in crocodylians ...
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 ...
A study on the morphological diversity of skull and jaw shape in crocodylomorphs throughout their evolutionary history is published by Stubbs et al. (2021). [34] A study on the evolution of the skull morphology in crocodyliforms is published by Felice, Pol & Goswami (2021). [35]
A study on the evolution of the skull morphology of non-avialan paravian theropods is published by Pei & Xu (2022). [160] A dromaeosaurid-like sickle claw, similar in some ways to Pyroraptor olympius, is reported from the Grès à Reptiles Formation by Brilhante et al. (2022). [161]
A study on the arrangement and morphology of the osteoderms of baurusuchids is published by Montefeltro (2019). [38] A study on the anatomy of the pterygoid region and skull airways of Caipirasuchus paulistanus and C. montealtensis is published online by Dias et al. (2019), who report possible anatomical evidence of vocal capacity of C ...
Evidence of the impact of function on the evolution of the lower jaw morphology in crocodile-line archosaurs is presented by Rawson et al. (2024). [16]A review of studies on the thermometabolism of crocodile-line archosaurs from the preceding 20 years is published by Faure-Brac (2024).
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 ...