Genus: Pariguana LONGRICH, BHULLAR & GAUTHIER, 2013a
Etymology: Latin, tri, "three," and Latin, pinnaculum, "peak or pinnacle"; in reference to the prominent tricuspid shape of the tooth crowns.

Species: lancensis LONGRICH, BHULLAR & GAUTHIER, 2013a
Etymology: In reference to the Lance Formation.

Holotype: AMNH 22208

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, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Partial mandible.