HUNT, LUCAS & HECKERT, 2001, 2002

Locaitly: Rainbow Forest Area, Flattops Sandstone 1, Flattops E Area, Petrified Forest, Apache County, Arizona.

Horizon: Upper Sonsela Sandstome Member, Petrified Forest Formation.

Biostratigraphy:

Age: Early Norian Stage, Late Triassic Epoch, Late Triassic.

Material:

Unnumbered: In situ: Anterior portion of a skull.
Note: The specimen is uncollectable (preserved underneath the cliff) but casts are preserved at the Mesalands Dinsoaur Museum and Petrified Forest National Park.