Holotype:

Locality: Near the Mygatt-Moore (M&M) Quarry, Mesa County, Western Colorado.

Horizon: Middle Brushy Basin Member, Morrison Formation.

Biostratigraphy: Zone 3.

Age: Comobluffian age, Kimmeridgian Stage, uppermost Malm Epoch, Late Jurassic.

Material: Fragmentary skull and fragmentary skeleton.