Holotype: DINO 11541

Locality: DIM 116 (N. N. A Quarry), near the Carnegie Quarry, Dinosaur National Monument, north of the little town of Jensen, Uintah County, Utah.

Horizon: Salt Wash Member, Morrison Formation.

Biostratigraphy: Zone 2.

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

Material: Skull and nearly complete skeleton of a subadult.
Note: With furcula.
Note: Has some pathologic gastralia.