Brontosaurus
"Brontosaurus" was a large, long-necked quadrupedal animal with a long, whip-like tail, and forelimbs that were slightly shorter than its hindlimbs. The largest species, "B. excelsus", weighed up to and measured up to long from head to tail. For comparison, the current largest land animal, the average male African bush elephant is 3.20 m (10.5 ft) tall at the shoulder and has a body mass of 6,000 kg (13,228 lb) or 6.6 short tons.
Supersaurus
Other bones that were found at the same location and originally thought to belong to "Ultrasauros", like a shoulder girdle (scapulocoracoid, BYU 9462), actually belonged to "Brachiosaurus", possibly a large specimen of "Brachiosaurus altithorax". The "Brachiosaurus" bones indicate a large, but not record-breaking individual, a little larger than the ""Brachiosaurus" brancai" ("Giraffatitan brancai") mount in the Berlin's Natural History Museum. Larger specimens of "Brachiosaurus" are known from the Tendaguru beds of Tanzania, in east Africa.