Triceratium inelegans from San Felipe, Baja, California, USA. Single example on the slide. Mounted in Styrax. Slight mountant yellowing. Prepared by RI Firth. 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. 33 images stacked in Zerene (Pmax). Quite a small diatom, and I couldn’t get close enough to use the 63x Leitz, which has limited the size and resolution of the image.
Triceratium inelegans Greville, 1866. Published in: Greville, R.K. (1866). Descriptions of new and rare Diatoms. Series XVIII. Transactions of the Microscopical Society, New Series, London 14: 1-9, pls I, II. Page 8, Plate 2, Figure 21. This name is currently regarded as a synonym of Trigonium inelegans (Greville) Mann, 1925. Published in: Mann, A. (1925). Marine diatoms of the Philippine Islands. Bulletin United States National Museum 100 (6, part 1): 1-182, 39 pls. Page 169.