Archosauria is normally defined as a crown group, which means that it only includes descendants of the last common ancestors of its living representatives. In the case of archosaurs, these are birds and …

archosaur, (subclass Archosauria), any of various reptiles, including all crocodiles and birds and all descendants of their most recent common ancestor.

Archosauria (the "ruling reptiles") is a major group of diapsids, differentiated from the other diapsids by the presence of single openings in each side of the skull, in front of the eyes (antorbital fenestrae), …

Gauthier redefined the Archosauria as a crown group, the last common ancestor of birds and crocodiles and all of its descendants: crocs + rocs. Generally speaking, this nomenclature has stuck. Above …

Archosauria (sometimes referred to as Archosaurs) are a group of reptiles that includes dinosaurs, crocodylomorphs, pterosaurs (flying reptiles), and their living descendents, represented by all extant …

Jul 20, 2025 · Scientifically, Archosauria is a crown group that includes the most recent common ancestor of all living birds and crocodilians, along with all of its descendants.

Feb 2, 2024 · Archosaurs comprise a monophyletic clade called Archosauria. This means all archosaurs descended from a single common ancestor and share these derived features.

Archosauria: Fossil Record Students of archosaur evolution are blessed with a wonderful fossil record for many groups of archosaurs, including some very bizarre extinct taxa.

Apr 29, 2025 · Ornithosuchia – Includes pterosaurs, dinosaurs, and birds Together, these two lineages make up the archosauria clade. During the Mesozoic era, archosaurs became the dominant group of …

Crurotarsi or Pseudosuchia: The crocodile line of crown-group Archosauria † Phytosauria: semi-aquatic long-snouted types † Aetosauria: quadrupedal armoured herbivores † Ornithosuchidae: look rather …