An arrangement of three Navicula lyra from Brazil. Prepared by William Allott Firth. Olympus BHB microscope using 450nm LED light. The larger one was imaged at high resolution with a 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. 49 images stacked in Zerene (Pmax).
Navicula lyra Ehrenberg 1841. Published in: Ehrenberg, C.G. (1841). Nachtrag zu dem Vortrage über Verbreitung und Einflufs des mikroskopischen Lebens in Süd-und Nord-Amerika. Bericht über die zur Bekanntmachung geeigneten Verhandlungen der Königlich-Preussischen Akademie der Wissenschaften zu Berlin 1841: 202-209. Page 203. This name is currently regarded as a synonym of Lyrella lyra (Ehrenberg) Karayeva.