An arrangement of Achnanthidium flexellum from Hulstein (?, if this is right, I think it is in the Netherlands). Prepared by Johann Diedrich Möller. 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. 58 images stacked in Zerene (Pmax). I left the background as is after the stack rather than replacing it with something smoother looking. Accepted name for this diatom: Eucocconeis flexella (Kützing) Meister, 1912.