Brachychampsa is an extinct genus of alligatoroid. Specimens have been found from New Mexico, Colorado, Wyoming, Montana,North and South Dakota, New Jersey, and Saskatchewan. The genus first appeared during the late Campanian stage of the Late Cretaceous and went extinct during the early Danian stage of the Paleocene, a few million years after the Cretaceousâ€“Paleogene extinction event. Brachychampsa is distinguished by an enlarged fourth maxillary tooth in the upper jaw.
This particular tooth was sourced from the Hell Creek formation near Jordan, Montana.