Benetorus fantasmus from Dosados canyon, California, USA. Marine fossil. Single example on the slide. Mounted in Darax and dated 22-02-2026. Prepared by Michel Haak. 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. 60 images Pmax.
Benetorus fantasmus Hanna 1927. Published in: Hanna, G.D. (1927). Cretaceous diatoms from California. Occasional Papers of the California Academy of Sciences 13: 5-[49]. Page 16, Plate 1, Figures 9,10. Also see: Sims, P.A. (1994). Benetorus, Gladiopsis and related genera from the Cretaceous. Diatom Research 9(1): 165-187, and Vladimir A. Nikolaev, David M. Harwood, Morphology and taxonomic position of the Late Cretaceous diatom genus Pomphodiscus Barker & Meakin, Micropaleontology (2000) 46 (2): 167–177. https://doi.org/10.2113/46.2.167