Rylandsia biradiata from Barbados. Marine fossil. Single example on the slide. Mounted in Darax and dated April 2024. Prepared by Michel Haak. 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. 39 images stacked in Zerene (Pmax).
Rylandsia biradiata Greville 1861. Published in: Greville, R.K. (1861). Descriptions of new and rare Diatoms. Series II. Transactions of the Microscopical Society, New Series, London 9: 67-73, pl. VIII. Page 68, Plate VIII [8], Figure 1.