Bathygnathus

Bathygnathus Temporal range: Permian (Roadian), 270Ma PreЄ Є O S D C P T J K Pg N ↓
Head of Bathygnathus borealis, very speculative restoration.
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Synapsida
Order:	Pelycosauria
(unranked):	Sphenacodontia
Genus:	Bathygnathus
Species
Bathygnathus borealis

Left maxilla of Bathygnathus borealis (below) with comparison of Dimetrodon's skull.

Bathygnathus was a pelycosaur-grade synapsid, a non-dinosaurian amniote which lived during the Permian Period (about 270 Ma). The only specimen of Bathygnathus was discovered on Prince Edward Island during the course of a well excavation, in Spring Brook in the New London area and its significance recognized by the local naturalist Francis Bain. It was originally described by Leidy in 1855 as the lower jaw of a dinosaur. The specimen is now known to represent the upper jaw (maxilla) of a sphenacodontid synapsid.

References

• DML Dinosaur Genera List