A slide of Aulacodiscs amoenus var. (presumably A. amoenus var. amoenus) from William’s Bluff, Oamaru, New Zealand. One example on the slide. Prepared by HJ Baker. No information on date or mountant. Olympus BHB microscope using 450nm LED light. Coverslip ring height prevented me from using the 63x Leitz objective for this one. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 39 images stacked in Zerene (Pmax).
Published in: Greville, R.K. (1864). Descriptions of new and rare Diatoms. Series XI. Transactions of the Microscopical Society, New Series, London 12: 8-14, pls I, II. In here it is written ‘Aulacodiscus amœnus‘.