An arrangement of Surirella striatula from England. Recent material. Heavily damaged coverslip, with one crack over one of the diatoms. Prepared by Arthur Charles Cole. Olympus BHB microscope using 450nm LED light. Main image using a 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. 12 images stacked in Zerene (Pmax).
Surirella striatula Turpin 1827. Published in: Turpin, P.J.F. (1827). Surirelle, Surirella. In: Dictionnaire des Sciences naturelles. Tome LI. STI-SYSTe-L. ( Eds), pp. 408–410. Paris & Strasbourg: F.G. Levrault. Publication date: December 1827 [TL-2]. Page 410, Plate 3.
Given the amount of damage to the coverslip I didn’t do any oil immersion images. I do however have some other examples of this species on the site, so have a look via the ‘search’ above for those.