Order Heterognathi (ray-finned fish)
Parent taxon: Ostariophysi according to D. S. Jordan 1963
Sister taxa: Allotriognathi, Anotophysa, Chanoides, Cyprinodontes, Eventognathi, Gymnonoti, Haplomi, Heterosomata, Nematognathii, Otophysi, Salmopercae, Selenichthyes, Siluroidea, Synentognathi, Xenarchi, Xenomi
Subtaxa: Characinidae Xiphiostomidae
Ecology:
Distribution: there are no occurrences of Heterognathi in the database