Parent taxon: Diapsida according to S. N. F. Spiekman and T. M. Scheyer 2019
See also Baciu and Chanet 2002, Benton 1985, Carroll 1988, Dalla Vecchia 2020, De-Oliveira et al. 2020, Dilkes and Sues 2009, Ezcurra 2016, Gauthier et al. 1989, Huene 1954, Laurin 1991, Li et al. 2017, Long and Murry 1995, Meyer and Zardoya 2003, Peng et al. 2001, Renesto 2005, Rieppel 1989, Senter 2004 and Spiekman et al. 2020
Sister taxa: Adelosaurus, Araeoscelidia, Archelosauria, Diaptosauria, Dolerosaurus, Drepanosauromorpha, Endennasauridae, Eosuchia, Fremouwsauridae, Horaffia, Hupehsuchia, Ichthyosauromorpha, Lanthanolania, Microzemiotes, Palacrodon, Prodiapsida, Rysosteus, Sauropterygia, Saurosphargidae, Stauromatodon, Thalattosauriformes, Utahdactylus, Utahdactylus kateae
Subtaxa: Aenigmastropheus Arctosaurus Chasmatosuchus vjushkovi Crocopoda Czatkowiella Elessaurus Exilisuchus Exilisuchus tubercularis Gwyneddosaurus Helveticosauroidea Jesairosaurus Mecistotrachelos Megalancosauridae Ocolurtaia Ocolurtaia arquata Prolacertiformes Protorosauria Protorosaurus Rhabdopelix longispinis Tanystropheidae Teraterpetidae Teyujagua Trilophosauridae