An arrangement of five Entogoniopsis pseudonervata (described as Triceratium pseudo-nervatum on the slide) from Oamaru, New Zealand. No makers name. Olympus BHB microscope using 450nm LED light. As well as the arrangement I imaged the largest one using 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 69 images stacked in Zerene (Pmax).
Triceratium pseudonervatum Grove & Sturt 1887. Published in: Grove, E. & Sturt, G. (1887). On a fossil marine diatomaceous deposit from Oamaru, Otago, New Zealand. Appendix. Journal of the Quekett Microscopical Club, Series 2 3(19): 131-148, pls 10-14. Page 136. This name is currently regarded as a synonym of Entogoniopsis pseudonervata (Grove & Sturt) J.Witkowski, P.A.Sims, N.I.Strelnikova & D.M.Williams 2015. Published in: Witkowski, J., Sims, P.A., Strelnikova, N.I. & Williams, D.M. (2015). Entogoniopsis gen. nov. and Trilamina gen. nov (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser. Phytotaxa 209: 1-89, 253 figures, 1 table. Page 30.
Also seen it referred to as Trigonium pseudonervatum. Trigonium pseudonervatum (Grove & Sturt) Hustedt 1959. Published in: Schmidt, A.[W.F.] (1959). Atlas der Diatomaceen-kunde. Series VIII (Heft 117-118) [F. Hustedt]. pp. pls 465-472. Akademie-Verlag. Plate 472, Figure 8.