Genus: Barosaurus MARSH, 1890
Etymology: Greek, barys “heavy, and Greek, sauros, “lizard”: “Heavy lizard”.

Species: lentus MARSH, 1890
Etymology:

Referred material:

ROTHSCHILD & MOLNAR, 2005

Locality: Quarry face as exposed inside the Dinosaur National Monument Visitor Center, Carnegie Quarry, Vernal, Uintah County, Utah.

Horizon: Brushy Basin Member, Morrison Formation.

Biostratigraphy: Zone 3.

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

Material:

DINO 874: Metatarsal II.

Note: Has a tendon calcification-exostoses, pathology.