Three slides with Aulacodiscus sp. from different sites in Oamaru. Prepared by Richard Gosden. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. Image stacks prepared in Zerene (Pmax).
Aulacodiscus sollittiianus var. novazealandica, Allan’s Farm. Single example on the slide. Mounted in Naphrax, dated September 1962 (IX/62).
Aulacodiscus probabilis ?, Cormack’s Siding. Single example on the slide. Less certain about this one, so a question mark for the name. Mounted in Styrax/Aroclor, dated November 1978 (XI/78).
Aulacodiscus schmidtii, Division Hill. Two examples on the slide. Mounted in Styrax/Aroclor, dated June 1966.
The slides did not have species names on them, so these have come from researching the usual places (Oamaru diatoms website, Desikachary and Sreelatha’s Oamaru diatoms book, etc).