longus" is displayed the Senckenberg Museum in Frankfurt (a skeleton made up of several specimens, donated in 1907 by the American Museum of Natural History), Germany.A mounted and more complete skeleton of "D. longus" is at the Smithsonian National Museum of Natural History in Washington, DC, while a mounted skeleton of "D. hallorum" (formerly "Seismosaurus"), which may be the same as "D. longus", can be found at the New Mexico Museum of Natural History and Science.