Several paleontologists took issue with his team's reconstruction of the dinosaur, which combined the new
partial skeleton with earlier fragmentary finds of specimens that differed in size, as well as data from Stromer's surviving notes.
Both of these areas produced an abundance of well - preserved Late Cretaceous and Eocene - aged fossils, including those of birds, plesiosaurs (long - necked marine reptiles; numerous isolated bones and at least one
partial skeleton), bony fishes (including
several skulls and
partial skeletons), sharks, whales, unidentified vertebrates, and a variety of beautifully - preserved invertebrates (e.g., ammonites, nautiloids, gastropods, bivalves, crustaceans).