Aulacodiscus margaritaceus var. Debyi from William’s Bluff, Oamaru, New Zealand. Single example on the slide. Prepared by WA Firth. Olympus BHB microscope using 450nm LED light. 20x Nikon Plan Apo NA 0.65 objective. Olympus Aplanat Achromat condenser, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 36 images stacked in Zerene (Pmax).