Species: ajax MARSH, 1877
Holotype: YPM 1860
Locality: Lakes' YPM Quarry 10, T4S, R70W, Sec. 35, Como Bluff, Albany County, Wyoming.
Horizon: Member? Morrison Formation.
Biostratigraphy: Zone?
Age: Age? Stage? Malm Epoch, Late Jurassic.
Material: Fragmentary skeleton, with braincase and quadrates of a juvenile?
Note: Gastroliths were found? CANON, 1906.
Referred material:
= Atlantosaurus immanis MARSH, 1878
Holotype: YPM 1840
Locality: Lakes' YPM Quarry 10, T4S, R70W, Sec. 35, Como Bluff, Albany County, Wyoming.
Horizon: Member? Morrison Formation.
Biostratigraphy: Zone?
Age: Age? Stage? Malm Epoch, Late Jurassic.
Material: Femur, fragmentary skeleton.
Note: Gastroliths were found? CANON, 1906.