Two examples of Triceratium grande from Jackson’s Well, Oamaru, New Zealand (presumably near Jackson’s Paddock). Boht with the rim up towards the coverslip (underside view). Mountant has yellowed. Prepared by William Allott Firth. Olympus BHB microscope using 450nm LED light. 20x Nikon Plan Apo NA 0.65 objective. Olympus Aplanat Achromat condenser, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 28 images stacked in Zerene (Pmax).
Triceratium grande Brightwell 1853. Published in: Brightwell, T. (1853). On the genus Triceratium, with descriptions and figures of the species. Quarterly Journal of Microscopical Science, London 1: 245-252, pl. IV. Page 249, Plate IV [4], Figure 8.