An arrangement of three Actinoptychus heterostrophus from Ananino, Russia. Mounted in Styrax, November 1938. Prepared by Samuel Henry Meakin. Olympus BHB microscope using 450nm LED light. As well as the arrangement I imaged the one on the left using the 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. 55 images stacked in Zerene (Pmax).
Actinoptychus heterostrophus A.W.F.Schmidt 1875. Published in: Schmidt, A.[W.F.] (1875). Atlas der Diatomaceen-kunde. Series I: Heft 8. pp. pls 29-32. Aschersleben: Verlag von Ernst Schlegel. Plate 29, Figure 2.