Parent taxon: Chondrichthyes according to E. D. Grogan and R. Lund 2009
See also Long 2011, Nelson 2006, Nelson et al. 2016, Sepkoski 2002, Zangerl 1981 and Zangerl and Case 1973
Sister taxa: Acanthodii, Bradyodontida, Cladoselachimorpha, Clamydoselachidae, Ctenacanthimorpha, Ctenoptychius ordii, Desmiodontida, Doliodus, Duplisuggestus, Elasmobranchii, Elegestolepis, Eucentrurus, Fasciodus, Geisacanthus, Gladbachus, Gogoselachus, Gracilisuggestus, Holocephali, Holocephalimorpha, Kathemacanthidae, Leonotus, Machichnus, Mongolepidida, Obtusacanthus, Plesioselachus, Polymerolepidiformes, Proprigalea, Ptomacanthus, Pucapampellidae, Pucapumpella, Qianodus, Rhinobatiformes, Shenacanthus, Simmorius, Sinacanthida, Subterbranchialia, Thaumatacanthus, Yuanolepis
Subtaxa: Iniopterygidae Inioxyle Sibyrhynchidae
Ecology: nektonic carnivore
Distribution: