An arrangement off three Lithodesmium californicum from Sendai, Japan. No makers name. Underside views with the rims towards the coverslip. I’ve brought them closer together for the high resolution image, just to reduce the gaps in the image. Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 21 images stacked in Zerene (Pmax).
Lithodesmium californicum Grunow in Van Heurck 1883. Published in: Van Heurck, H. (1883). Synopsis des Diatomées de Belgique. Atlas., pl. 104-132, 22bis, 82 bis, 83 bis, 83 ter, 95 bis.: Ducajou & Cie., Anvers. Plate CXV (115), Figure 9.