Aulacodiscus apedicellatus Rattray fossil marine diatom arrangement from Inza, Russia. 10 examples of the diatom on the slide. Prepared by ECP Bone. Mounted in Styrax and dated February 1967. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.40 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 24 images stacked in Zerene (Pmax).