An arrangement of three Coscinodiscus subconcavus from Algoa Bay, guano Algoa Bay is on Eastern Cape, South Africa). Prepared by Arthur Cottam. Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850. 45 images stacked in Zerene (Pmax).
Coscinodiscus subconcavus Grunow 1878. Published in: Schmidt, A.[W.F.] (1878). Atlas der Diatomaceen-kunde Series II: Heft 15. pp. pls 57-60. Aschersleben: Verlag von Ernst Schlegel. Plate 59, Figures 12,13.