Genus: Apatosaurus non MARSH, 1877

Species: minimus MOOK, 1917
= Atlantosaurus minimus (MOOK, 1917) STEEL, 1970

Holotype: AMNH 675

Locality: Bone Cabin Quarry, 8 miles north of Como, Medicine Bow Anticline (also called Flat top Anticline), Albany County, Wyoming.

Horizon: Salt Wash Member, Morrison Formation.

Biostratigraphy: Zone 2.

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

Material: Sacrum, and pelvis.