Holotype:

Locality: NMMNH locality 4576, West Canyon, Coconino County, Arizona.

Horizon: Navajo Sandstone.

Biostratigraphy:

Age: Upper Pliensbachian-Toarcian Stage, Upper Lias Epoch, Early Jurassic.

Material:

NMMNH P-33097: Ventral scute impressions and some additional whole and partial dorsal scutes, fragmentary but articulated vertebrae with some neural arch fragments, a partial pes and numerous bone fragments.

NMMNH P-33098: A second fragmentary specimen.