Genus: Primaderma NYDAM, 2000
Etymology: Latin, primus, "first or early," in reference to this taxon being the oldest helodermatid-like lizard, and Latin, derma, "skin," a common suffix used for the names of helodermatid-like lizards ; frist –skin.

Species: nessovi NYDAM, 2000
Etymology: In honor of the late Lev A. Nesov and his many contributions to paleoherpetology.
= Nova NYDAM, 1995, NYDAM, 1998

Holotype: OMNH 26742

Locality: OMNH locality V695, Emery County, Utah.

Horizon: Mussentuchit Member, Uppermost Cedar Mountain Formation.

Biostratigraphy:

Age: Mussentuchitan age, Uppermost Albian-Lowermost Cenomanian Stage, Upper Gallic subepoch, Lowest Gulf Epoch, Late Early to Early Middle Cretaceous.

Material: Partial left dentary with 1 complete and 2 broken teeth.

Referred material:

OMNH 27750: Partial left dentary with 1 complete and 2 broken teeth.

OMNH 28444: Cervical.

OMNH 34399: Dorsal vertebra.

 

Locality: OMNH locality V235, Emery County, Utah.

Horizon: Mussentuchit Member, Uppermost Cedar Mountain Formation.

Biostratigraphy:

Age: Mussentuchitan age, Uppermost Albian-Lowermost Cenomanian Stage, Upper Gallic subepoch, Lowest Gulf Epoch, Late Early to Early Middle Cretaceous.

Material:

OMNH 34311:

 

Locality: OMNH locality V696, Emery County, Utah.

Horizon: Mussentuchit Member, Uppermost Cedar Mountain Formation.

Biostratigraphy:

Age: Mussentuchitan age, Uppermost Albian-Lowermost Cenomanian Stage, Upper Gallic subepoch, Lowest Gulf Epoch, Late Early to Early Middle Cretaceous.

Material:

OMNH 27022: A partial parietal.

 

Locality: OMNH locality V695, Emery County, Utah.

Horizon: Mussentuchit Member, Uppermost Cedar Mountain Formation.

Biostratigraphy:

Age: Mussentuchitan age, Uppermost Albian-Lowermost Cenomanian Stage, Upper Gallic subepoch, Lowest Gulf Epoch, Late Early to Early Middle Cretaceous.

Material:

OMNH 22071, 22122: