Species: major BRANSON & MEHL, 1929 (nomen dubium)
Etymology: Latin, major, "greater."

Holotype: UM 511 VP

Locality: Near Joseph City, Navajo County, Arizona.

Horizon: Chinle Group.

Biostratigraphy:

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

Material: Right clavicle.

Paratype:

UM 582VP: Vertebra.