Genus: Kaatedocus TSCHOPP & MATEUS, 2013
Etymology: Crow (Absaroka) language, kaate, "small," one of the Native American tribes of northern Wyoming. "Docus' is an allusion to Diplodocus and the Greek, "beam."

Species: siberi TSCHOPP & MATEUS, 2013
Etymology: In honor of Hans-Jakob 'Kirby' Siber, b. 1942, doctor honoris causa of the University of Zurich, Switzerland. Siber is the founder and director of the Sauriermuseum Aathal, Switzerland, and organized and funded the excavation, preparation and curation of the holotype of Kaatedocus siberi.

Holotype: SMA 0004

Locality: Howe Quarry, near Shell, Greybull, Big horn County, Wyoming.

Horizon: Salt Wash Member, Morrison Formation.

Biostratigraphy: Zone 2.

Age: Comobluffian age, Kimmeridgian Stage, uppermost Malm Epoch, Late Jurassic.

Material: Fragmentary skull (right premaxilla, both maxillae, left lacrimal, both frontals, both postorbitals, bothquadratojugals, both quadrates, both squamosals, both parietals, complete braincase, both dentaries, right surangular and both articulars) and cervical vertebrae (proatlas to cervical 14).

Kaatedocus siberi (modified from TSCHOPP & MATEUS, 2013), Holotype: SMA 0004.