Coscinodiscus centralis from South Africa. Single example on the slide. Mounted in Hyrax, and issues with the mounting. Prepared by Flatters and Garnett Ltd. Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 24 images stacked in Zerene (Pmax).
Coscinodiscus centralis Ehrenberg 1839. Published in: Ehrenberg, C.G. (1839). Über die Bildung der Kreidefelsen und des Kreidemergels durch unsichtbare Organismen. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin 1838: 59-147, pls I-IV, tables 1, 2. Page 129. Heterotypic synonyms; Coscinodiscus asteromphalus var. centralis Grunow 1884, Coscinodiscus oculus-iridis var. tenuistriatus Grunow 1884.