A group of five Coscinodiscus oblongus from Barbados. Described as fossil, and ‘rare’. Prepared by Arthur Charles Cole. Olympus BHB microscope using 450nm LED light. 20x Nikon Plan Apo 0.65 objective. Olympus Aplanat Achromat condenser, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 50 images stacked in Zerene (Pmax).
Coscinodiscus oblongus 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 4, Plate I, Figures 9,10. This name is currently regarded as a synonym of Craspedodiscus ellipticus Gombos, 1982. Published in: Gombos, A.M., Jr. (1982). Early and Middle Eocene diatom evolutionary events. Bacillaria 5: 225-242, 2 figures, 4 plates. Page 231.