Archosauromorpha
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Archosauromorpha is a clade of diapsid reptiles containing all reptiles more closely related to archosaurs than lepidosaurs. Archosauromorphs first appeared during the late Middle Permian or Late Perm
An interaction between two archosauromorphs: Ornithosuchus ( a member of Archosauriformes) scavenging on Hyperodapedon (a rhynchosaur)
The skeleton of Protorosaurus, one of the oldest archosauromorphs and namesake of the problematic group "Protorosauria"
Champsosaurus, a gharial-like choristodere which survived the Cretaceous-Paleocene extinction event. Choristoderes may represent the fifth group of archosauromorphs, but their origin is obscured.
Archelosauria
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Archelosauria is a clade grouping turtles and archosaurs and their closest relatives, to the exclusion of lepidosaurs. Most phylogenetic analyses based on molecular data have supported a sister-group
Mesosaurus BW
Milleretta BW
Hovasaurus BW