Parent taxon: Euselachii according to J. A. Long 2011
See also Adnet et al. 2008, Cappetta 1992, Chandler et al. 2006, Cicimurri and Knight 2009, Delsate et al. 2002, Dica et al. 1996, Duffin and Ward 1983, Engelbrecht et al. 2017, Engelbrecht et al. 2017, Ginter et al. 2010, Gottfried and Fordyce 2000, Gottfried and Fordyce 2001, Kriwet 2005, Kriwet 2008, Kriwet et al. 2009, Kriwet et al. 2007, Long 1992, Nelson et al. 2016, Shimada et al. 2024, Shimada et al. 2014, Skinner et al. 2020 and Thies 1983
Sister taxa: Acronemus, Artiodus, Cheirostephanus, Ctenacanthiformes, Dasyatiformes, Favusodus, Galei, Galeoidei, Hueneichthys, Hybodonta, Hybodontiformes, Musteliformes, Notidaniformes, Protacrodontiformes, Protacrodontoidea, Scyliorhiniformes, Sphenacanthidae, Squatinoidei, Squatinorajiformes, Surcaudalus, Synechodontidae
Subtaxa: Agaleidae Anachronistidae Batoidea Batomorphii Dalatiiformes Duffinselache Galea Galeomorphii Grozonodon Hopleacanthus Mcmurdodontidae Nanocetorhinus Odontorhytis Ostenoselachidae Palaeocarcharidae Rhomaleodus Selachii Squalea Squalomorphii Squatinomorphii Synechodontiformes Vallisodus