Gnathorhizidae

Gnathorhizidae Temporal range: 323–237 Ma PreꞒ Ꞓ O S D C P T J K Pg N Carboniferous - Middle Triassic
Gnathorhiza
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Sarcopterygii
Class:	Dipnoi
Order:	Ceratodontiformes
Family:	†Gnathorhizidae Miles, 1977
Genera
†Gnathorhiza †Monongahela †Beltanodus ? †Microceratodus †Namatozodia †Persephonichthys

The Gnathorhizidae are an extinct family of lungfish that lived from the late Carboniferous until the middle Triassic. Gnathorhizid fossils have been found in North America, Madagascar, Australia, and possibly Eastern Europe and South Africa. They are characterized by high-ridged toothplates that form cutting blades and a reduction in cranial bones.