Genus: Cerberophis LONGRICH, BHULLAR & GAUTHIER, 2013a
Etymology: Cerberus, a snake-tailed guardian of the underworld in Greek mythology and Greek, ophis, "snake."

Species: rex LONGRICH, BHULLAR & GAUTHIER, 2013a
Etymology: Greek, rex, "king."

Holotype: UCMP 130696

Locality: UCMP V80096, Garfield County, Montana.

Horizon: Hell Creek Formaiton.

Biostratigraphy:

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

Material: Trunk vertebra.