Clade Galeoidei (elasmobranch)
Parent taxon: Euselachii according to D. S. Jordan 1963
See also David 1943
Sister taxa: Acronemus, Artiodus, Cheirostephanus, Ctenacanthiformes, Dasyatiformes, Favusodus, Galei, Hueneichthys, Hybodonta, Hybodontiformes, Musteliformes, Neoselachii, Notidaniformes, Protacrodontiformes, Protacrodontoidea, Scyliorhiniformes, Sphenacanthidae, Squatinoidei, Squatinorajiformes, Surcaudalus, Synechodontidae
Subtaxa: Galeidae Pliotremidae
Ecology: nektonic carnivore
Distribution:
• Miocene of United States (1: Washington collection)
• Eocene of Italy (1)
• Paleocene of United States (1: California)
Total: 3 collections each including a single occurrence