An arrangement of a few different diatoms from Oamaru, New Zealand. Unknown maker. Olympus BHB microscope using 450nm LED light. I imaged the Triceratium rugosum (view from the side) with a 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. 70 images stacked in Zerene (Pmax).
Triceratium rugosum E.Grove & G.Sturt, 1887. Original description: Grove, E.; Sturt, G. (1887). On a fossil marine Diatomaceous Deposit from Oamaru, Otago, New Zealand. Part III. Journal of the Quekett Microscopical Club, Series 2. 3(18): 63-78. Page 75, Plate V, Figure 4.
I recently acquired about 30 more slides by this maker to add to the ones I already had, so if you want to see others by them, search for AAAAA in the Search option at the top of the page, and I’ll include this in each of the pages for them.