Triceratium tripolare from Sendai, Japan. Single example on the slide. Some yellowing of the mountant, but not bad near the diatom. Prepared by Arthur Cottam. Olympus BHB microscope using 450nm LED light. 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. 41 images stacked in Zerene (Pmax).
Triceratium tripolare Tempère & Brun, 1889. Published in: Brun, J. & Tempère, J. (1889). Diatomées fossiles du Japon. Espèces marines et nouvelles des calcaires argileux de Sendaï et de Yedo. Mémoires de la Société de Physique et d’Histoire Naturelle de Genève 30(9): 1-75, 9 plates [I–IX]. Page 66.