An arrangement of Coscinodiscus robustus from Sendai, Japan. Prepared by WH Darlaston. Olympus BHB microscope using 450nm LED light. As well as the arrangement, I imaged one using a 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. 50 images stacked in Zerene (Pmax). This is rim upwards towards the coverslip.
Coscinodiscus robustus Greville 1866. Published in: Greville, R.K. (1866). Descriptions of new and rare Diatoms. Series XVIII. Transactions of the Microscopical Society, New Series, London 14: 1-9, pls I, II. Page 3, Plate 1, Figure 8. This name is currently regarded as a synonym of Endictya robusta (Greville) Hanna & Grant 1926. Published in: Hanna, G.D. & Grant, W.G. (1926). Expedition to the Revillagigedo Islands, Mexico, in 1925, II. Miocene marine diatoms from Maria Madre Island, Mexico. Proceedings of the California Academy of Sciences, series 4, 15(2): 115-[193]. [in English]. Page 144, Plate 16, Figures 2,3 (as ‘robustus‘).