Auliscus gigas. Single example on the slide. Prepared by Richard Suter. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 77 images stacked in Zerene (Pmax).
Original description: Schmidt, A. (1888). Atlas der Diatomaceen-kunde. Leipzig. Fues’s Verlag (R. Reisland), Series III(Heft 29-30): pls. 113-120. Plate 117, fig. 4.