Triceratium grave from Jérémie, Hayti [Haiti]. Single example on the slide. No makers name. 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. 48 images stacked in Zerene (Pmax).
Triceratium grave. Schmidt’s Atlas Plate 77, Figure 17. Also see: Jakub Witkowski, Patricia A. Sims, Nina I. Strelnikova & David M. Williams, “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), 89 pp. The naming of T. grave is apparently very complex. I’ve been told by a diatom naming expert that this would likely now fall under the name Entiogoniopsis tabellaria.
I’m not sure on the maker for this, but I have just imaged a few of them which I think are by the same maker, and they are all interesting slides. If you want to see others by this maker search for BBBBB in the search function.
EDIT – based on the handwriting and style, and some conversations with experts, I this could be by Edmund Grove (of Grove and Sturt). But I have no 100% proof of this at the moment.