An arrangement of four Triceratium favus var. quadrata from Oamaru, New Zealand. Prepared by William Allott Firth. Olympus BHB microscope using 450nm LED light. The smallest one (upper middle in the arrangement) was imaged at high resolution with a 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. 65 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.