Stictodiscus jeremianus from Hayti [Haiti]. Single example on the slide, underside facing towards the coverslip. Unknown maker. 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. 44 images stacked in Zerene (Pmax).
S. jeremianus is shown in Schmidt’s Atlas (plate 131, figure 1). For more about the name and the similarity of this to S. johnsonianus f. jeremianus see here.
I recently acquired about 60 slides by this maker, 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.