Two examples of Glorioptychus callidus from Panoche [Hills], California, USA. The smaller one on the left is titled slightly. Rather ‘oranged’ mountant. Prepared by JA Long. 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. 11mm of the tube to the camera removed to improve the field of view. Monochrome converted Nikon d850 camera. 61 images stacked in Zerene (Pmax).
Glorioptychus callidus Hanna 1927. Published in: Hanna, G.D. (1927). Cretaceous diatoms from California. Occasional Papers of the California Academy of Sciences 13: 5-[49]. Page 20, Plate 2, Figures 7,8.