Locality: Jacobs Bone Bed, 7592, San Juan County, New Mexico.

Horizon: Naashoibito Member, Latest Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

UALP 15629, 15630: Two damaged right UP4.

UALP 15631: Anterior left UP4.