Notes on Mesozoic vertebrate fossils Author Marsh, O. C. text American Journal of Science 1892 1892-05-31 260 171 176 journal article 10.5281/zenodo.2838842 7ea885fa-a128-4dff-accd-c3d234a97859 2838842 (4) The most abundant teeth are much smaller, with no crenulations, and the posterior ridge sharp and not grooved. The wear is in front of the apex, and on one side, sometimes on both sides, as in. figure 6, Plate III . *Proc. Acad. Nat. Sci. Philadelphia, p. 198, 1868. This tooth may be taken as the type of a new species, Aublysodon cristatus .