Genus: Tawa NESBITT, SMITH, IRMIS, TURNER, DOWNS & NORELL, 2009
Etymology: Hopi name for the Puebloan sun god.

Species: hallae NESBITT, SMITH, IRMIS, TURNER, DOWNS & NORELL, 2009
Etymology: In honor of Ruth Hall, who collected many of the specimens that formed the genesis of the Ghost Ranch Ruth All Museum of Paleontology (GR) Collection.

Holotype: GR 241

Locality: Site 2, Hayden Quarry (HQ), Ghost Ranch, Rio Arriba County, New Mexico.

Horizon: Petrified Forest Formation, Chinle Group.
(Petrified Forest Member, Chinle Formation).

Biostratigraphy:

Age: Revueltian, Early Norian Substage, Early Norian Epoch, Middle Late Triassic Epoch, Late Triassic.

Material: A nearly complete associated but disarticulated skull and postcranial skeleton.

Paratype:

GR 155: Ilium, pubes, proximal ischium, femora, sacral vertebra and caudal vertebrae.

GR 242: A nearly complete skeleton of a larger specimen.

GR 243: Cervical vertebrae.

GR 244: Complete right femur.

Referred material:

GR 240: Nearly complete femur.

 

Locality: Site 3, Hayden Quarry (HQ), Ghost Ranch, Rio Arriba County, New Mexico.

Horizon: Petrified Forest Formation, Chinle Group.
(Petrified Forest Member, Chinle Formation).

Biostratigraphy:

Age: Revueltian, Early Norian Substage, Early Norian Epoch, Middle Late Triassic Epoch, Late Triassic.

Material:

Number: Not given.

 

Locality: Site 4, Hayden Quarry (HQ), Ghost Ranch, Rio Arriba County, New Mexico.

Horizon: Petrified Forest Formation, Chinle Group.
(Petrified Forest Member, Chinle Formation).

Biostratigraphy:

Age: Revueltian, Early Norian Substage, Early Norian Epoch, Middle Late Triassic Epoch, Late Triassic.

Material:

Not given: