Aulacodiscus rogersii from Dunkirk, Maryland. Single example on the slide. Accepted Name: Eupodiscus rogersii Ehrenberg, 1844. Fossil marine (Miocene). Prepared by Emiliano Bellotti. Mounted in Naphrax and dated 2024. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 91 images stacked in Zerene (Pmax).