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Aulacodiscus grunowii from Castel, Hungary. Single example on the slide. Prepared by ECP Bone. Mounted in Naphrax, dated March 1963. Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 19 images stacked in Zerene (Pmax).