Cresswellia superba from Barbados. Single example on the slide. Prepared by Frederick Marshall. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, slightly oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 55 images stacked in Zerene (Pmax).
Creswellia superba Greville 1861. Published in: Greville, R.K. (1861). Descriptions of new and rare Diatoms. Series II. Transactions of the Microscopical Society, New Series, London 9: 67-73, pl. VIII. : Page 68, Plate VIII, Figures 3-5 (as ‘Cresswellia superba‘). This name is currently regarded as a synonym of Stephanopyxis superba (Greville) Grunow 1884. Published in: Grunow, A. (1884). Die Diatomeen von Franz Josefs-Land. Denkschriften der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe, Wien 48(Abt. 2): 53-112, 5 pls. Page 91. Also referred to as Pyxidicula superba (Greville) N.I.Strelnikova & V.A.Nikolaev 1986.