An arrangement of four Actinoptychus halionyx by Watson and Sons Ltd. Olympus BHB microscope using 450nm LED light. As well as the arrangement I imaged one using the 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 camera. 56 images stacked in Zerene (Pmax).
Actinoptychus halionyx Grunow 1867. Published in: Grunow, A. (1868 ‘1867’). Algae. In: Reise der österreichischen Fregatte Novara um die Erde in den Jahren 1857, 1858, 1859 unter den Befehlen des Commodore B. von Wüllerstorf-Urbair. Botanischer Theil. Erster Band. Sporenpflanzen. (Fenzl, E. et al. Eds), pp. 1-104. Wien [Vienna]: Aus der Kaiserlich Königlichen Hof- und Staatsdruckeri in Commission bei Karl Gerold’s Sohn. Page 25. This name is currently regarded as a synonym of Actinoptychus splendens var. halionyx (Grunow) Grunow 1883. Published in: Van Heurck, H. (1882). Synopsis des Diatomées de Belgique. Atlas. pp. pls LXXVIII-CXXXII [78-132 and supplementary pls 22 bis, 82bis, 83bis, 83ter, 95bis], tables genres. Anvers: Ducaju et Cie. Plate 119 Figure 3, Plate 120 Figures 3,5.