Glyphodiscus stellatus from Cape Agulhas. Single example on the slide. Described in: Greville, R.K. (1862). Descriptions of new and rare diatoms. Series VI. Transactions of the Microscopical Society, New Series, London 10: 89-96, pl. IX. Prepared by RI Firth. Mounted in Hyrax and dated August 1946. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 21 images stacked in Zerene (Pmax).