An arrangement of nine Eupodiscus oculatus from Monterey, California, USA. Fossil marine. Cal. Ac. Sc. Loc. 40631. Type locality. Mounted in Naphrax and dated January 1968. Prepared by ECP Bone. Olympus BHB microscope using 450nm LED light. I selected one (the 7th one from the left in the arrangement) for further high resolution imaging. 63x Leitz Pl Apo NA 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. 30 images stacked in Zerene (Pmax).
Eupodiscus oculatus Greville 1862. Published in: Greville, R.K. (1862). Descriptions of new and rare diatoms. Series VI. Transactions of the Microscopical Society, New Series, London 10: 89-96, pl. IX. Page 90, Plate IX, Figure 3.
This name is currently regarded as a synonym of Pseudauliscus oculatus (Greville) P.A.Sims. Pseudauliscus oculatus (Greville) P.A.Sims 2001. Published in: Sims, P.A. (2001). The genus Praetriceratium gen. nov.: a survey of eupodiscoid genera with a sipho marginalis. Diatom Research 16(2): 399-416. Page 405.
Also known as Roperia oculata (Greville) Kuntze 1898: (as ‘Ropera oculata‘). Published in: Kuntze, O. (1898). Revisio generum plantarum. Vol. 3(3) pp. 1-576. Leipzig, London, Milan, New York, Paris: Arthur Felix, Dulau & Co., U. Hoepli, Gust. E. Stechert, Charles Klincksieck. Page 424.