Holotype of Baculites obtusus (USNM 1934a). Original unmodified images provided by courtesy of the Smithsonian NMNH and adapted and presented here under a Creative Commons BY-NC 4.0 license (NMNH GUID http://n2t.net/ark:/65665/395003221-f7cb-49d6-9c45-e10c74d1b2a6). Baculites obtusus from the Late Cretaceous of New Mexico (UNM 981).