†unranked clade Nothosauriformes Storrs 1991 (diapsid)
Full reference: G. W. Storrs. 1991. Anatomy and relationships of Corosaurus alcovensis (Diapsida: Sauropterygia) and the Triassic Alcova Limestone of Wyoming. Bulletin of the Peabody Museum of Natural History 44:1-151
Parent taxon: Sauropterygia according to G. W. Storrs 1991
Sister taxa: Atopodentatus, Cercidopleura, Dicranopleura, Eosauropterygia, Eusauropterygia, Ischyrosaurus, Microleptosaurus, Nanchangosauroidea, Nothosauria, Pistosauria, Placodontia, Placodontiformes, Plesiosauria, Simosauria
Subtaxa: none
Ecology:
Distribution: found only at Favret Canyon, Agusta Mountains (Triassic of Nevada)