Slide labelled as Auliscus (n. sp.) from Arroyo Hondo, Maria Madre Island, Mexico. Single example on the slide. Fossil marine Miocene material. Mounted in Naphrax and dated July 1969. Prepared by ECP Bone. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 57 images stacked in Zerene (Pmax).
I’m not sure as to species, and it could even be a new species as written on the slide. I’ve not seen patterning quite like it before. Comments welcome.