Species: horneri HUNT & LUCAS, 1993
Etymology: In honor of John Horner
Holotype: BYU 12950
Locality: Betonnie Tsosie Arroyo (incorrectly referred to Kimbeto Arroyo), San Juan Basin, New Mexico.
Horizon: Early Kirtland Formation, probably correlative with the Farmington Member.
Age: Kirtlandian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: A partial skull.