Species: gracile WILLISTON, 1904 (nomen dubium)
Etymology:

Holotype:

Locality: From the Popo Agie River, Fremont County, Wyoming.

Horizon: Popo Agie Formation.

Biostratigraphy:

Age: Otischalkian, Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material: Scapulacoracoid, humerus, ventral ribs, large part of skull? shattered from exposure.