Keywords
Archosauriformes
Archosauria
Paleobiology
How to Cite
Abstract
Abstract: The Archosauromorpha is defined as the clade that comprises all diapsids more closely related to the lineage of birds (Ornithodira or Avemetatarsalia) and crocodylians (Pseudosuchia or Crurotarsi) than to Lepidosauria. In addition to their ‘basal’ taxa (e.g., Tanystropheidae, Rhynchosauria, and Allokotosauria), Archosauromorpha includes the clade Archosauriformes, which, by its turn, includes Archosauria. During the Triassic, the archosauromorphs became the main group of diapsids to diversify in body size and morphological disparity. The Permo-Triassic mass extinction occurred 252 million years ago and produced a dramatic change in the composition of the floral and faunal communities at the beginning of the Triassic period. The diversification of Archosauromorpha during the Triassic has been the focus of several recent studies, as this clade is a classic example of adaptive radiation. Here we synthesized relevant information on the morphology, paleobiology, and the effects of the end-Permian mass extinction in the group, an event directly linked to the beginning of the consolidation of modern faunas.
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