Two examples of Heliopelta nitida from Santa Monica, California, USA. Some crystals visible in the mountant. Prepared by William Allott Firth. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oblique lighting, oil immersion. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 59 images stacked in Zerene (Pmax).
Heliopelta nitida Greville 1866. Published in: Greville, R.K. (1866). Descriptions of new and rare Diatoms. Series XVIII. Transactions of the Microscopical Society, New Series, London 14: 1-9, pls I, II. Page 5, Plate 2, Figure 18. This name is currently regarded as a synonym of Actinoptychus nitidus (Greville) A.W.F.Schmidt.