This taxon is considered subjective synonym of
of the valid taxon Brontosaurus
according to the Paleobiology Database.
See the page for Brontosaurus →
Bibliography
Original description
R. T. Bakker. 1998. Dinosaur mid-life crisis: the Jurassic-Cretaceous transition in Wyoming and Colorado. Lower and Middle Cretaceous Terrestrial Ecosystems, New Mexico Museum of Natural History and Science Bulletin 14:67-77