Species: greeni WELLES, 1947
Etymology:

Holotype: UCMP 37804

Locality: Holbrook quarry, UC V-3922, on Highway 66, 6 miles west of Holbrook, immediately west of Geronimo Trading post, Apache County, Arizona.

Horizon: Holbrook Member, Moenkopi Formation.

Biostratigraphy:

Age: Ansian, Middle Triassic Epoch, Early-Middle Triassic.

Material: Fragmentary left dentary with 12 teeth.