Pinnularia raëana from Hong Kong. Single example on the slide. Prepared by William Allott Firth. Olympus BHB microscope using 450nm LED light. 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. 73 images Pmax.
Pinnularia raëana Castracane 1886. Published in: Castracane, [C.A.] F. (1886). Report on the Diatomaceae collected by H.M.S. Challenger during the years 1873-76. In: Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-76. Botany. Vol. II. (Murray, J. Eds), pp. [1]-178. Page 25, Plate XV [15], Figure 3. This name is currently regarded as a synonym of Pinnulariosigma raëanum (Castracane) Desikachary, Raja Rao & Sridharan 1989. Published in: Desikachary, T.V. (1989). Atlas of Diatoms, Fascicle VI. Marine Diatoms of the Indian Ocean region. pp. [v+] 27, pl. 622-809. Madras. Page 5 (as ‘raëana‘).