Actinoptychus decorans from Papakaio, Oamaru, New Zealand. Single example on the slide. Very low contrast. Prepared by JA Long. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oblique lighting, oil immersion. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 54 images stacked in Zerene (Pmax).
Actinoptychus decorans A.W.F.Schmidt 1890. Published in: Schmidt, A.[W.F.] (1890). Atlas der Diatomaceen-kunde Series IV: Heft [39/40]. pp. pls 153-160. Leipzig: Fues’s Verlag (R. Reisland). Plate 155, Figure 14.