Species: jacksonorum ROMER, 1937
Etymology:

Holotype: AMNH 4782

Locality: El Cobre Canyon, Rio Arriba County, New Mexico.

Horizon: Lower Cutler Formation or Upper Cutler Formation.

Biostratigraphy:

Age: Virgilian, Gzelian Epoch, Late Pennsylvanian or Wolfcampian Stage, Lower Rotliegendes Epoch, Early Permian.

Material: Pelvis and limb bones.

Referred material:

AMNH 4790: Fragmentary remains.

AMNH 4796 (partim): Fragmentary remains.