Holotype:

Locality: Along Cabin Creek, near Gunnison, Gunnison County, Colorado.

Horizon: Lowermost Salt Wash Member, Lowermost Morrison Formation.

Biostratigraphy: Zone 2.

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

Material: Several partial cervical vertebrae, posterior end of a dorsal centrum, caudal centra, fragmentary scapula, fragmentary pubis, right ischium, distal end of left ischium, femur, and rib shafts.