Genus: Lonchisaurus LONGRICH, BHULLAR & GAUTHIER, 2013a
Etymology: Greek, lonchus, "spear," in refernce to the Lance Formation that produced the holotype, and Greek, saurus, "lizard."

Species: trichurus LONGRICH, BHULLAR & GAUTHIER, 2013a
Etymology: Greek, trichos, "hairy," and Greek, uros, "tail", in reference to the Bushy Tailed Blowout locality (UCMP V-5711).

Holotype: AMNH 15446

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: Left dentary.