Griphognathus (from Greek, Modern (1453-);: γρίφος 'riddle') and Greek, Modern (1453-);: γνάθος 'jaw') is an extinct genus of lungfish from the late Devonian period of Europe and Australia.
Griphognathus was a specialized lungfish, about 60cm (20inches) long, with an elongated snout. The lower jaw and palate were lined with tooth-like denticles. Like all other lungfish, its skin was covered by overlapping scales, and it had an asymmetrical tail.[1]