4-245 million years ago. Corosaurus was first named by Ermine Cowles Case in 1936 and the type species is Corosaurus alcovensis. The specific name is derived...

2. 59, 1–59. Storrs, G. W. 1991. "Anatomy and relationships of Corosaurus alcovensis (Diapsida: Sauropterygia) and the Triassic Alcova Limestone of Wyoming"...

†Coniophis – type locality for genus †Corax Corbula †Coriops †Corosaurus †Corosaurus alcovensis Crenella †Cretorectolobus †Cretorectolobus olsoni †Ctenacodon...

†Coriops †Coriops amnicolus †Cornophyllum †Cornophyllum wardii †Corosaurus †Corosaurus alcovensis Cossmannea Crassatella †Crassatella evansi †Crassidenticulum...