Holotype:

Locality: Ward Terrace, Arizona.

Horizon: Dinosaur Canyon Member, Moenave Formation.

Biostratigraphy:

Age: Hettangian to Sinemurian Stage, Lower Lias Epoch, Early Jurassic.

Material: 2 individuals, nearly complete but isolated left and right pelvis, a partial femur, many disarticulated vertebrae, ribs and phalanges, and several isolated teeth.