Order Nematognathii Gill 1861
Alternative spellings: Nematognathi, Nematognathi
Parent taxon: Ostariophysi according to D. S. Jordan 1963
See also Cope 1891, Hay 1902 and Lambe 1908
Sister taxa: Allotriognathi, Anotophysa, Chanoides, Cyprinodontes, Eventognathi, Gymnonoti, Haplomi, Heterognathi, Heterosomata, Otophysa, Salmopercae, Selenichthyes, Siluroidea, Synentognathi, Xenarchi, Xenomi
Subtaxa: Ameiuridae Argidae Bunocephalidae Hypophthalmidae Lepidoglanidae Pygidiidae
Distribution: there are no occurrences of Nematognathii in the database