An arrangement of five Coscinodiscus lineatus from Singelevo, Russia. Fossil marine. Sty.mix (styrax max) and dated August 1966. Prepared by ECP Bone. Olympus BHB microscope using 450nm LED light. I selected one (the fourth from the left) for imaging at higher resolution. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, slightly oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 48 images stacked in Zerene (Pmax).
Coscinodiscus lineatus 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. This name is currently regarded as a synonym of Thalassiosira leptopus (Grunow) Hasle & G.Fryxell.