Order Heterosomata Cope 1871 (ray-finned fish)
Parent taxon: Ostariophysi according to D. S. Jordan 1963
Sister taxa: Allotriognathi, Ancylostylidae, Anotophysa, Cyprinodontes, Erythrinolepidae, Eventognathi, Gymnonoti, Haplomi, Heterognathi, Nematognathii, Otophysa, Salmopercae, Selenichthyes, Siluroidea, Synentognathi, Xenarchi, Xenomi
Subtaxa: Hippoglossidae Synapturidae
Ecology:
Distribution:
• Quaternary of United States (1: California collection)
• Miocene of France (1)
Total: 2 collections each including a single occurrence