Genus: Prototeius DENTON & O’NEILL, 1995
Etymology: Greek, proto, “First, or earliest form of”, + Teius, type genus of the family, Teiidae, latinized form of Portuguese Tegu, from Tupi-Guaranian word of Teju.
= Genus: Nova DENTON, O’NEILL, PARRIS & GRANDSTAFF, 1992

Species: stageri DENTON & O’NEILL, 1995
Etymology: In honor of the late David C. Stager, vertebrate paleontologist, New Jersey naturalist, historian, and the geology librarian at Princeton University’s Guyot Hall.
= cf. Chamops segins

Holotype: NJSM 15668

Locality: Quarry “B”, Quarry “C”, Logjam Quarry, Easter Quarry, at the Ellisdale Site, southwest of Allentown, in Upper Freehold Township, Monmouth County, New Jersey.

Horizon: Basal Marshalltown Formation, Matawan Group.

Biostratigraphy:

Age: Upper Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Right dentary with teeth.

Referred material:

NJSM 15125, 15655, 14205, 15428, 15298, 15857, 15851, 15263, 15865: Dentaries.

NJSM 15252, 15130, 15671, 15672, 15253, 15131, 15028, 15854, 15866: Maxillae.

NJSM 15423, 15251, 15848, 15853: Premaxillae.

NJSM 15129, 15821, 15822, 15823, 15863: Parietals.

NJSM 15436: Frontal.

NJSM 15820: Right ectopterygoid.

NJSM 15827: Left pterygoid.

NJSM 15426, 15868: Articulars.

NJSM 15829: Right retoarticular.

NJSM 15654: Left postorbital.

NJSM 15656: Left vomer.

NJSM 15832: Right postfrontal.

NJSM 15831: Squamosal.

NJSM 15386, 15860: Quadrates.

NJSM 15133: Autotomous caudal vertebra.

NJSM 15652: Fused astragalo-calcaneum.

NJSM 15888: Right 1/2 atlas.

NJSM 15881: Right coracoid.