Two examples of Nitzschia vivax from Rio de Janeiro, Brazil. Prepared by WA Firth. Olympus BHB microscope using 450nm LED light. As well as the two 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. 31 images stacked in Zerene (Pmax). 576nm striae spacing, 463nm puncta spacing (as measured using ImageJ.
Nitzschia vivax W.Smith 1853. Published in: Smith, W. (1853). A synopsis of the British Diatomaceae; with remarks on their structure, function and distribution; and instructions for collecting and preserving specimens. The plates by Tuffen West. In two volumes. Vol. I. pp. [i]-xxxiii, 1-89, pls I-XXXI. London: John van Voorst, Paternoster Row. Page 41, supp. plate XXXI [31], figure 267. This name is currently regarded as a synonym of Hantzschia vivax (W.Smith) Grunow 1877. Published in: Grunow, A. (1877). New diatoms from Honduras, with notes by F. Kitton. Monthly Microscopical Journal, London 18: 165-186, pls 193-196. Page 174. This is a brackish species. Type locality: “Fresh or slightly brackish water. Near Lewes, Oct. 1852, W. Sm.” [England]; (Smith 1853: 41).