Aulacodiscus brownei Norman ex Ralfs from Maria Madre Island, Mexico. 56µm diameter. Prepared by ECP Bone. Mounted in Naphrax, dated June 1969. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.40 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 17 images stacked in Zerene (Pmax).