Archosauria Cope 1869 [Gauthier & Padian 1985], nom. cl. inval. see Clade Archosauria Cope 1869 [Gauthier & Padian 2020] 1 Crurotarsi Sereno & Arcucci 1990 2 Avemetatarsalia Benton 1999 see Clade Ornithodira Gauthier 1986