Syndetoneis amplectans from Oamaru, New Zealand. Single (paired) example on the slide. Mounted in Styrax. 4/68 on the label – I’m assuming this could be the date (April 1968). Prepared by RI Firth. Olympus BHB microscope using 450nm LED light. 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. 45 images stacked in Zerene (Pmax).
Syndetoneis amplectans (Grove & Sturt) Grunow, 1888. Published in: Grunow, A. (1888). Referate. Grove, E. and Sturt, G. On a fossil marine diatomaceous deposit from Oamaru, Otago, New Zealand (Journal of the Quekett Microscopical Club. Ser. II Vol. III. No. 18 and No. 19.1887. Part III and appendix.). Botanisches Centralblatt 34(2/3): 34-41. Page 36. This name is currently regarded as a synonym of Rutilaria amplectans (Grove & Sturt) R.Ross 1995. Published in: Van Heurck, H. (1896). A treatise on the Diatomaceae. Translated by W.E. Baxter. pp. 1-558, pls 1-35. London: William Wesley & Son. Page 17, Figures 8-10; Plate 1 d-f. Basionym: Hemiaulus amplectans Grove & Sturt.