Chondrichthyes - Petalodontiformes
Alternative spelling: Petalodontida
Full reference: R. Zangerl. 1981. Chondrichthyes I: Paleozoic Elasmobranchii. Handbook of Paleoichthyology 3a
Parent taxon: Holocephali according to R. van der Laan 2019
See also Ginter et al. 2010, Goto and Okura 2004, Hodnett et al. 2023, Long 2011, Nelson 2006, Nelson et al. 2016 and Sepkoski 2002
Sister taxa: Chimaeri, Debeeriformes, Debeeriiformes, Delphyodontos, Desmiodontidae, Desmiodus, Edaphodus, Eugeneodontiformes, Gregoriidae, Harpacanthidae, Helodontiformes, Holocephalomorpha, Iniopterygiformes, Lagarodontidae, Macrodontacanthus, Menaspacanthus, Orodontiformes, Paraselachiamorpha, Paraselachimorpha, Thoralodus, Trachyacanthi, Mesolophodus, Ageleodus, Euglossodus, Cynopodius, Metaxyacanthus
Subtaxa: Belantseidae Janassidae Obruchevodidae Paracymatodus Petalodontidae Petalorhynchidae Pristodontidae Serratodus
Distribution:
• Cretaceous of Italy (1 collection), United States (3: Arizona)
• Permian of Bolivia (1), Brazil (1), China (2), Germany (13), Greenland (1), Iran (1), Japan (6), Oman (1), Pakistan (1), the Russian Federation (2), the United Kingdom (3), United States (23: Arizona, Kansas, New Mexico, Oklahoma, Texas, Wyoming)
• Carboniferous to Permian of the Russian Federation (1)
• Carboniferous of Canada (1: Nova Scotia), Greenland (1), Italy (2), Japan (1), the Russian Federation (1), Slovenia (2), the United Kingdom (26), United States (48: Alabama, Arizona, Indiana, Iowa, Kansas, Kentucky, Missouri, Montana, Nebraska, New Mexico, Ohio, Oklahoma, Pennsylvania, South Dakota, Texas, West Virginia)
Total: 142 collections including 218 occurrences