An arrangement of three Arachnoidiscus japonicus from seaweed from Japan. Prepared by WA Firth. Olympus BHB microscope using 450nm LED light. I imaged the lower righthand side one at higher resolution. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oblique lighting, oil immersion. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 26 images stacked in Zerene (Pmax).
Arachnoidiscus japonicus Shadboldt ex Pritchard 1852. Published in: Pritchard, A. (1852). A history of infusorial animalcules, living and fossil illustrated by several hundred magnified representations. A new edition, enlarged. pp. [i]-viii, [1]-704, plus 24 pls. London: Whittaker and Co., Ave Maria Lane. : Pages 319, 700, Plate 24, Figures 18-21.