Species: crassidens CAMP, 1942
Etymology:

Holotype: LACM (CIT) 2759

Locality: CIT no 328, 800 feet S and 300 feet W of NE cor of Sec. 36, T14S, R11E, Mount Diablo Base Line and Meridian, U.S.Geol. Survey, Panoche quadrangle, Panoche Hills 3 miles SSSE of the type locality of Plotosaurus tuckeri, Fresno County, California.

Horizon: Moreno Formation.

Biostratigraphy:

Age: Maastrichtian Stage, uppermost Senonian subepoch, Gulf Epoch, Late Cretaceous.

Material: Skull and lower jaws.

Referred material:

LACM/CIT 2753: A badly crushed skull and anterior vertebrae, associated parts of a scapula and a right humerus.

BELL, 1997

UCBMP 126716, 137249, 137248: Incomplete skull and skeleton.

AMNH 1490 (in part):

HILTON, 2003

LACM/CIT 2750: Skull, dentary and skeleton.