Slide labelled as ‘Achnanthes ?’ from Hayti [Haiti]. However I think this an example of Stauroneis pulchella. S. pulchella is currently regarded as a synonym of Trachyneis aspera (Ehrenberg) Cleve and/or Trachyneis aspera var. pulchella (W.Smith) Cleve 1894). Unknown maker. Olympus BHB microscope using white LED light. 63x Leitz Pl Apo 1.40 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 32 images stacked in Zerene (Pmax).
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.