Campylodiscus biangulatus from New Hebrides (Vanuatu, Pacific Ocean). Single example on the slide. Mounted in Hyrax, very yellow mountant, and some issues with it. Cracked coverslip, centred on one of the coverslip spacers. Broken pieces of a coverslip used as spacers. Prepared by Flatters and Garnett Ltd. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 103 images stacked in Zerene (Pmax).
Campylodiscus biangulatus Greville 1862. Published in: Greville, R.K. (1862). Descriptions of new and rare diatoms. Series V. Transactions of the Microscopical Society, New Series, London 10: 18-29, pls II, III. Page 20, Plate III [3], Figure 2. Also see Schmidt’s Atlas Plate 14, Figure 18.