Rhaphoneis nodulifera from Papakaio, Oamaru, New Zealand. Single example on the slide. Fossil material. Mounted in Naphrax and dated December 1962. 47µm major axis. Prepared by ECP Bone. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 12 images stacked in Zerene (Pmax).
Rhaphoneis nodulifera (Grove & Sturt) A.W.F.Schmidt 1894. Published in: Schmidt, A.[W.F.] (1894). Atlas der Diatomaceen-kunde. Series V: Heft [50]. pp. pls 193-196. Leipzig: O.R. Reisland. Plate 193, Figure 12 (hence the ‘a.s.a. 193/12’ on the slide). This name is currently regarded as a synonym of Drewsandria nodulifera (E.Grove & G.Sturt) P.A.Sims & R.Ross. Source of Synonymy: Sims, P.A. & Ross, R. (1996). Drewsandria a new genus of araphid diatoms. Bieih. Nova Hedwigia 112: 301-306, 8 fig. Also described as Cocconeis nodulifera Grove & Sturt, 1887.
Also spelt as nodulifer. Rhaphoneis nodulifer f. major Desikachary & Sreelatha, 1989. Desikachary, T.V. & Sreelatha, P.M. (1989). Oamaru Diatoms. Bibliotheca Diatomologica, 19: pp. 3-330, pls 1-145. Page 225, Plate 86 Figure 7, Plate 95 Figure 1.