Invalid subtaxa: Coluber steinheimensis Fraas 1870 [nomen dubium], Ophidium Burmeister 1885 [nomen dubium], Ophidium incertum Burmeister 1885 [nomen dubium], Protropidonotus steinheimensis Fraas 1870 [nomen dubium]
Parent taxon: Ophidia according to M. W. Caldwell et al. 2015
See also Augé and Rage 2006, Benton 1985, Carroll 1988, de Lapparent de Broin et al. 2020, Estes and Berberian 1970, Estes et al. 1988, Fraas 1870, Frank and Ramus 1996, Hay 1902, Hay 1930, Holman et al. 1991, Kuhn 1966, Lee and Caldwell 2000, Lee and Scanlon 2002, Martinelli and Forasiepi 2004, McCartney and Seiffert 2016, Moyano-Paz et al. 2022, Pyron et al. 2013, Rage 1984, Rage et al. 2008, Romer 1966, Stocker and Kirk 2016, Szyndlar and Rage 2003, Thurmond and Jones 1981, Venczel and Stiuca 2008, Vianey-Liaud et al. 2014 and Wilson et al. 2010
Sister taxa: Amblycephalidiformia, Angiostomata, Asinea, Boaeformia, Colubriformia, Coniophidae, Haasiophis, Najash, Norisophis, Psammophidae, Sanajeh, Seismophis, Simoliophiidae, Solenoglypha, Tortricina
Subtaxa: Alethinophidia Botrophis Cheilophis Cholophidia Colubridae Coniophis Coniophis cosgriffi Coniophis dabiebus Coniophis precedens Diablophis Dinilysia Dinilysiidae Dipsadidae Eophis Goinophis Hoffstetterella Hoffstetterella brasiliensis Hoplocephalus Lunaophis Madtsoiidae Natricidae Ophidion Ophidioniscus Ophidium Palaeophiidae Portugalophis Pseudonaja Pythonoidea Scolecophidia Tomodon Xiaophis