A “two-column (double-beamed [vertebra]) lizard” from Late Jurassic. Recent research suggests that this type of vertebra may be part of the huge Supersaurus skeleton found near the same site at Dry Mesa Dinosaur Quarry in Colorado, and so belongs to a diplodocid, not a brachiosaurid.

This fossil may really be a Supersaurus. Named by U. S. paleontologist James A. Jensen in 1985.