Genus: Koparion CHURE, 1994
Etymology: From the Greek, Koparion, "a small surgical knife"; an allusion to the small size of the serrated tooth that is the type specimen.

Species: douglassi CHURE, 1994
Etymology: In honor of Earl Douglass, who discovered and excavated the great dinosaur quarry for which Dinosaur National Monument was created.

Holotype: DINO 3353

Locality: DNM-94 (Quarry 94), Rainbow Park mico site, Dinosaur National Monument West, Rainbow Park Area, Uintah County, Utah.

Horizon: Upper Brushy Basin Member, Morrison Formation.

Biostratigraphy: Zone 4.

Age: Upper Part, Comobluffian age, Tithonian Stage, uppermost Malm Epoch, Late Jurassic.

Material: A single, nearly complete maxillary tooth 2 mm high.