An arrangement of four Biddulphia rigida from Oamaru. Prepared by Watson and Sons Ltd. 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. 50 images stacked in Zerene (Pmax).
Biddulphia rigida A.W.F.Schmidt 1888. Published in: Schmidt, A.[W.F.] (1888). Atlas der Diatomaceen-kunde. Series III: Heft 29/30 [“Heft 25”]. pp. pls. 113-120. Aschersleben: Commissions-Verlag von Ludwig Siever’s Buchhandlung. Plate 120, Figures 1,2. This name is currently regarded as a synonym of Biddulphiella rigida (A.Schmidt) P.A. Sims & M.P. Ashworth. Source of synonymy: Sims, P.A., Ashworth, M.P., Theriot, E.C. & Manning, S.R. (2022 ‘2023’). Molecular and morphological analysis of Biddulphia sensu lato: a new diagnosis of Biddulphia, with a description of the new genera Biddulphiella and Neobrightwellia. Marine Micropaleontology 178(102186): 1-21, 21 figs.