Aulacodiscus margaritaceus var. debyi from Jackson’s Paddock, Oamaru, New Zealand. Single example on the slide. Prepared by William Allott Firth. Olympus BHB microscope using 450nm LED light. 20x Nikon Plan Apo 0.65 objective. Olympus Aplanat Achromat condenser, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 77 images stacked in Zerene (Pmax).
Aulacodiscus margaritaceus var. debyi (Pantocsek) Rattray 1888. Published in: Rattray, J. (1888). A revision of the genus Aulacodiscus Ehrb. Journal of the Royal Microscopical Society 8(3): 337-382, 3 pls [V-VII]. Page 351.