Gnathorhiza

Gnathorhiza; Temporal range: Late Carboniferous to Early Triassic
	Restoration
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Sarcopterygii
Class:	Dipnoi
Order:	Ceratodontiformes
Family:	†Gnathorhizidae
Genus:	†Gnathorhiza; Cope, 1883
Type species
	†Gnathorhiza serrata; Cope, 1883
Species
	G. pusilla Cope, (1877); G. serrata Cope, 1883; G. dikeloda Olson, 1951; G. noblensis Olson & Daly, 1972; G. bothrotreta Berman, 1976; G. bogdensis Minkh, 1977; G. lozovskii Minikh, 1977; G. otschevi Minikh, 1977; G. triassica Minikh, 1977; G. tatarica Minikh, 1989;

Gnathorhiza is an extinct genus of prehistoric lobe-finned fish (lungfish) which lived from the Carboniferous period to the Early Triassic epoch. It is the only known lungfish genus to have crossed the Permo-Triassic boundary. Several species have been described, ranging in size from 5 to 50 centimeters.