An arrangement of seven Coscinodiscus tuberculatus from Springfield, Barbados. No makers name, but based on the style this is by Laurence Hardman. Olympus BHB microscope using 450nm LED light. As well as the arrangement I imaged one using the 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. 29 images stacked in Zerene (Pmax). Underside view with the rim towards the coverslip.
Coscinodiscus tuberculatus Greville, 1861. Published in: Greville, R.K. (1861). Descriptions of new and rare Diatoms. Series I. Transactions of the Microscopical Society, New Series 9: 39-45, pl. IV. Page 42, Plate IV, Figure 6. This name is currently regarded as a synonym of Azpeitia tuberculata (Greville) Sims , 1986. Published in: Fryxell, G.A., Sims, P.A. & Watkins, T.P. (1986). Azpeitia (Bacillariophyceae): Related genera and promorphology. Systematic Botany Monographs 13: 1-74, 33 figs. Page 10.
A bonus slide from Springfield, also by Hardman. Hemiaulus sp. and a few others including a fragment of Brightwellia johnsonii.
Olympus BHB microscope using 450nm LED light. Single images with a 10x Nikon Plan Apo NA 0.45 objective. Olympus Aplanat Achromat condenser, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera.