Genus: Hesperosaurus CARPENTER, MILES & CLOWARD, 2001
Species: mjosi CARPENTER, MILES & CLOWARD, 2001
CHRISTIANSEN & TSCHOPP, 2010
Locality: Howe-Stephens Quarry, 44°39'N, 107°49'W, 450 m southwest of the historic Howe Quarry, near Shell, Greybull, Big Horn County, Wyoming.
Horizon: Member? Morrison Formation.
Age: Age?, Stage?, Malm Epoch, Late Jurassic.
SMA 0018: Fragmentary skull and skeleton.
Note: With skin impressions.