Two examples of Triceratium cellulosum var. simbirskiana from Kamischev, Russia. Mounted in Styrax and dated May 1939. Prepared by Samuel Henry Meakin. Olympus BHB microscope using 450nm LED light. As well as the pair I imaged each one using the 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. Images stacked in Zerene (Pmax), 55 for the left one, and 45 for the right one. The left on is dipping down towards the right hand side.
Triceratium cellulosum var. simbirskianum Witt, 1885. Published in: Witt, O.N. (1886 ‘1885’). Ueber den Polierschiefer von Archangelsk-Kurojedowo im Gouv. Simbirsk. Verhandlungen der Russisch-kaiserlichen Mineralogischen Gesellschaft zu St. Petersburg, Series II 22: 137-177, pls. VI-XII. Page 168, Plate XII, Figures 8-10 (as ‘simbirskiana‘). This name is currently regarded as a synonym of Medlinia simbirskiana (Witt) P.A.Sims 1998. Published in: Sims, P.A. (1998). The early history of the Biddulphiales. I. The genus Medlinia gen. nov. Diatom Research 13(2): 337-374, 86 figs. Pages 361-363, Figures 60-66, 80-82.