Chondrichthyes - Euchondrocephali

Alternative spelling: Petalodontida

Full reference: R. Zangerl. 1981. Chondrichthyes I: Paleozoic Elasmobranchii. Handbook of Paleoichthyology 3a

Parent taxon: Euchondrocephali according to M. Ginter et al. 2010

Sister taxa: Ageleodus, Brachyrhizodus, Cynopodius, Debeerius, Desmiodus, Eugeneodontiformes, Euglossodus, Gregoriidae, Heteropetalus, Mesolophodus, Metaxyacanthus, Orodontiformes, Paraselachii

Subtaxa: Belantseidae, Brachyrhizodus, Janassidae, Paracymatodus, Petalodontidae, Pristodontidae, Serratodus

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Ecology: nektonic carnivore