Two examples of Triceratium favus var. quadrata from Oamaru, New Zealand. 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. 46 images stacked in Zerene (Pmax).
Triceratium favus var. quadratum Grunow 1885. Published in: Schmidt, A.[W.F.] (1885). Atlas der Diatomaceen-kunde Series III: Heft 21/22. pp. pls 81-88. Aschersleben: Commissions-Verlag Von Ludwig Siever’s Buchhandlung. Plate 84, Figures 4,5 (as ‘quadrata‘). This name is currently regarded as a synonym of Triceratium favus f. quadratum (Grunow) Hustedt.