Diatoms from Sierra Leone (South west coast of West Africa). Slide labelled as Nitzschia brightwellia, rare. More on this in a minute. Prepared by Laurence Hardman. Olympus BHB microscope using 450nm LED light. As well as the full arrangement I imaged some of them using the 40x Leitz Pl Apo 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 81 images stacked in Zerene (Pmax). Nitzschia brightwellii (note the spelling difference) is the large one at the bottom of this image, which also shows a number of other diatoms.
Nitzschia brightwellii Kitton ex Ralfs 1861. Published in: Pritchard, A. (1861). A history of infusoria, including the Desmidiaceae and Diatomaceae, British and foreign. Fourth edition enlarged and revised by J. T. Arlidge, M.B., B.A. Lond.; W. Archer, Esq.; J. Ralfs, M.R.C.S.L.; W. C. Williamson, Esq., F.R.S., and the author. pp. [1]-xii, [1]-968, 40 pls [I-XV]. London: Whittaker and Co.. Page 780, Plate VIII [8], Figure 7. This name is currently regarded as a synonym of Tryblionella brightwellii (Kitton) D.G.Mann 1990. Published in: Round, F.E., Crawford, R.M. & Mann, D.G. (1990). The diatoms. Biology and morphology of the genera. pp. [i-ix], 1-747. Cambridge: Cambridge University Press. Page 678.