Genus: Bothriagenys NYDEM, 2002
Etymology: Greek, bothrion, (dimininutive for ‘bothros), "trench" and Greek, genys, "jaw": In reference to the narrow Meckel’s groove along the length of the dentary.

Species: mysterion NYDEM, 2002
Etymology: Greek, mysterion, "mystery": In reference to uncertain familial affinities of new taxon.

Holotype: OMNH 28119

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: Left dentary.

Hypodigm

Locality: OMNH locality V868, 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 22118: Dentary fragment.