Auliscus tripinnatus from Division Hill, Oamaru, New Zealand. Single example on the slide. Mounted in Styrax Aroclor and dated 27/5/[19]65. 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. 11 images stacked in Zerene (Pmax). Couldn’t get close enough with the 63x Leitz objective, so resolution is limited.
Auliscus tripinnatus Bone & Gosden 1968. Published in: Bone, E.C.P. & Gosden, R. (1968). New fossil marine diatoms from Oamaru, New Zealand (Second Series). Microscopy, the Journal of the Quekett Microscopical Club 31(3): 70-78. Page 74, Figure 6.