Reptilia - Dinosauria - Diplodocidae

Belongs to Diplodocus according to P. Upchurch et al. 2004

Sister taxa: Diplodocus carnegii, Diplodocus hallorum, Diplodocus lacustris, Diplodocus longus

Type specimen: HMS 175 (= CM 662), a partial skeleton. Its type locality is Red Fork Powder River Quarry A, which is in a Kimmeridgian/Tithonian pond horizon in the Morrison Formation of Wyoming.

Ecology: ground dwelling herbivore

Average measurements (in mm): femur 1448.0 x 227.0, femur circumference 590.0, fibula 983.0 x 107.0, fibula circumference 279.0, humerus 922.9 x 180.3, humerus circumference 459.4, radius 672.9 x 93.8, radius circumference 248.5, tibia 935.0 x 174.0, tibia circumference 444.0, ulna 728.0 x 83.0, ulna circumference 275.0

Estimated body mass: 14.1 tons based on femur circumference, femur length, and humerus circumference