"upright lizard"   Named for the construction of the pelvis, which supposedly indicated a sauropod that could rear on its hind legs to feed. Resembles Camarasaurus but differs from all other known sauropods in having bifurcated neural spines on its presacral vertebrae from the third cervical to the posterrormost dorsal.  

The skeleton is missing only the skull, the hind limbs, the left forelimb, and the rear portion of the tail. It displays an unusually inclined pelvis, unlike that of most other sauropods, that Jensen says support his bipedality hypothesis.