An arrangement of three Glorioptychus callidus from Moreno Shale, Y Canyon, California, USA. Mounted in Hyrax, and dated November 1962. Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, slightly oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 40 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.