A group of Pinnularia viridis from Cave Hill, Belfast, Ireland. Prepared by WA Firth. Olympus BHB microscope using 450nm LED light. As well as the group I imaged one using the 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. 25 images stacked in Zerene (Pmax).
Pinnularia viridis (Nitzsch) Ehrenberg 1843. Published in: Ehrenberg, C.G. (1843). Verbreitung und Einfluss des mikroskopischen Lebens in Süd- und Nord-Amerika. Abhandlungen der Königlichen Akademie der Wissenschaften zu Berlin 1841: [291]–445 + [1, Berichtigungen], pls 1–4. Pages 305, 315 (adnot.), 385 [Plate 1, Figure 7].