Tanysauria
Tanysauria
Extinct clade of archosauromorph reptiles
Tanysauria (meaning "long lizards") is an extinct clade long-necked archosauromorph reptiles from the Triassic period of Europe, Asia, North America, and South America. It comprises the families Tanystropheidae and Trachelosauridae (found by the authors to be coextensive with Dinocephalosauridae, and a senior synonym of the latter). Within the Archosauromorpha, Tanysauria represents the sister group to the Crocopoda.[1] It contains many of the species formerly placed in "Protorosauria", which is now thought to be a paraphyletic group.