Stictodiscus californicus, single example on the slide. Prepared by Watson and Sons Ltd. 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. 40 images Pmax.
Stictodiscus californicus Greville 1861. Published in: Greville, R.K. (1861). Descriptions of new and rare Diatoms. Series IV. Transactions of the Microscopical Society, New Series, London 9: 79-87, pl. X. Page 79, Plate 10, Figure 1.