Species: lancensis FOX, 1976
Etymology: In refercence to the Lance Formation.

Holotype: UALVP 12073

Locality: UCMP V-5711, Bushy Tailed Blowout, Quarry area includes the floor of a small blowout approximately 10 yards northwest of the highest point on the ridge forming the northeastern side of the blowouts of loc. V-5003, S 1/2, Sec. 20, T37N, R64W, Lance Creek, Powder River Basin, Niobrara County, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, Upper Senonian subepoch, Upper Upper Gulf epoch, Late Cretaceous.

Material: left Maxilla.

Referred material:

UA 12074: Right frontoparietal.

UA 12075: left Maxilla.

UA 12076: left frontoparietal.

UA 12077: Right frontoparietal.

UA 12078: left frontoparietal.

UA 12079: Right (?) squamosal (?).

UA 12080: left (?) squamosal (?).

UA 40162: Squamosal.