Chondrichthyes - Orodontiformes
Full reference: R. Zangerl. 1981. Chondrichthyes I: Paleozoic Elasmobranchii. Handbook of Paleoichthyology 3a
Parent taxon: Holocephali according to J. A. Long 2011
Sister taxa: Chimaeri, Debeeriformes, Debeeriiformes, Delphyodontos, Edaphodus, Eugeneodontiformes, Helodontiformes, Holocephalomorpha, Iniopterygiformes, Macrodontacanthus, Menaspacanthus, Paraselachiamorpha, Paraselachimorpha, Petalodontiformes, Thoralodus, Trachyacanthi, Gregoriidae, Brachyrhizodus, Cynopodius, Lagarodontidae, Euglossodus, Desmiodus, Metaxyacanthus, Mesolophodus, Ageleodus, Pseudodontichthyidae
Subtaxa: none
Ecology: nektobenthic carnivore
Distribution:
• Permian of Brazil (1 collection), United States (4: Kansas, Texas)
• Carboniferous of the Russian Federation (1), the United Kingdom (3), United States (7: Arizona, Indiana, Kansas, Missouri)
• Devonian of United States (1: California)
Total: 17 collections each including a single occurrence