Genus: Eubrachiosaurus WILLISTON, 1904
Etymology: Greek, eu, “good”, Greek, brakhion, “arm” and Greek, sauros, “lizard”: Strong armed lizard.

Species: browni WILLISTON, 1904
Etymology:

Holotype: FMNH UC 633.

Locality: Vicinity of the Little Popo Agie River, near Lunder, Fremont County, Wyoming.

Horizon: Upper Popo Agie Formation.

Biostratigraphy:

Age: Otischalkian, Late Carnian Stage, Lower Late Triassic Epoch, Late Triassic.

Material: Humerus, scapula and left side of pelvis.