Holotype of Prionocyclus macombi (USNM 20259). 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:/65665/3c21d9ee6-b675-4edc-99f0-c934d73e42f5).