Unappreciated diversification of stem archosaurs during the Middle Triassic predated the dominance of dinosaurs

Christian Foth, Martín D. Ezcurra, Roland B. Sookias, Stephen L. Brusatte, Richard J. Butler

Research output: Contribution to journalArticlepeer-review

Abstract

Archosauromorpha originated in the middle–late Permian, radiated during the Triassic, and gave rise to the crown group Archosauria, a highly successful clade of reptiles in terrestrial ecosystems over the last 250 million years. However, scientific attention has mainly focused on the diversification of archosaurs, while their stem lineage (i.e. non-archosaurian archosauromorphs) has often been overlooked in discussions of the evolutionary success of Archosauria. Here, we analyse the cranial disparity of late Permian to Early Jurassic archosauromorphs and make comparisons between non-archosaurian archosauromorphs and archosaurs (including Pseudosuchia and Ornithodira) on the basis of two-dimensional geometric morphometrics.
Original languageEnglish
JournalBMC Evolutionary Biology
Volume16
Issue number1
DOIs
Publication statusPublished - 15 Sep 2016

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