Coscinodiscus lewisianus from Santa Monica, USA. Single example on the slide. 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, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 41 images stacked in Zerene (Pmax).
Coscinodiscus lewisianus Greville 1866. Published in: Greville, R.K. (1866). Descriptions of new and rare diatoms. Series XX [actually XIX]. Transactions of the Microscopical Society, New Series 14: 77-86, pls VIII, IX. Page 78, Plate VIII [8], Figures 8-10. This name is currently regarded as a synonym of Araniscus lewisianus (Greville) Komura 1998. Published in: Komura, S. (1998). A perplexing morphotype of some centric diatoms inclusive of Coscinodiscus lewisianus Grev. and its allies. Diatom 14: 1-23, 147 figs [photographs], 1 text-fig.. Page 6.