Arctopoda Haeckel, 1895
Archosaurs are a group o diapsid amniotes whose livin representatives consist o birds an crocodilians. This group an aa includes aw extinct dinosaurs, extinct crocodilian relatives, an pterosaurs. Archosauria, the archosaur clade, is a croun group that includes the maist recent common auncestor o livin birds an crocodilians. It includes twa main clades: Pseudosuchia, which includes crocodilians an thair extinct relatives, an Avemetatarsalia, which includes birds an thair extinct relatives (such as non-avian dinosaurs an pterosaurs).