An arrangement of four Auliscus sculptus. Two (upper left and lower right) are underside views with the rims towards the coverslip. Prepared by Flatters and Garnett Ltd. Olympus BHB microscope using 450nm LED light. As well as the view of the arrangement, I imaged the upper right one using the 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. 65 images stacked in Zerene (Pmax).
Auliscus sculptus (W.Smith) Brightwell 1860. Published in: Brightwell, T. (1860). On some of the rarer or undescribed species of Diatomaceae. Part II. Quarterly Journal of Microscopical Science, London 8(31): 93-96, 139, pls 5, 6. Page 139. Homotypic synonyms; Eupodiscus sculptus W.Smith 1853, Aulacodiscus sculptus (W.Smith) Brightwell 1860. Heterotypic synonyms; Auliscus caelatus Bailey 1854, Auliscus caelatus var. delicatula Rattray 1888, Auliscus sculptus var. caelatus (J.W.Bailey) Van Heurck 1896.