Diplocaulus Temporal range: Permian
Diplocaulus magnicornus
Scientific classification
Kingdom:	Animalia
Class:	Amphibia
Subclass:	†Lepospondyli
Order:	†Nectridea
Genus:	†Diplocaulus
Species
D. salamandroides (type) D. magnicornis

Diplocaulus (meaning "double stalk") was an early amphibian, now extinct. It had a boomerang-shaped head formed by two long bones at the back of the head. It had four short legs, and a short, flattened tail. It was about 3 feet (1 m) long.