Aulacodiscus sollittianus from Artesian Well sounding, Atlantic City, New Jersey, USA. Single example on the slide with 5 processes. Prepared by William Allott Firth. Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 108 images stacked in Zerene (Pmax).
Aulacodiscus sollittianus G.Norman 1861. Published in: Norman, G. (1861). On some undescribed species of Diatomaceae. Transactions of the Microscopical Society, London, New Series 9: 5-9, pl. II. Page 7, Plate 2, Figure 5.