Two slides of Auliscus sp. from Oamaru sites. Fossil marine material. Prepared by ECP Bone. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. Images stacked in Zerene (Pmax).
First is from Division Hill.
Single example on the slide. Mounted in Hyrax and dated November 1965. 47 images stacked. As for species, I initially thought Auliscus moronensis, but the more I look at it the less convinced I am by that. Maybe Auliscus pruinosus, as that seems to encompass quite a wide range of morphologies. Comments welcome.
Second one is from Flume Gulley.
Single example on the slide. Mounted in Naphrax and dated December 1971. 43 images stacked. I’m a bit more confident about naming this one, and I think it might be Auliscus elegans var. subpunctata Rattray 1888. Published in: Rattray, J. (1888). A revision of the genus Auliscus Ehrenberg and of some allied genera. Journal of the Royal Microscopical Society 1888: 861-920, 5 pls [XII-XVI]. Page 873, Plate XVI [16], Figure 2.