An arrangement of three Biddulphia pulchella from Bermuda. Top down and side views. Mounted in Styrax and dated 17/9/1994. Prepared by Klaus Kemp. Olympus BHB microscope using 450nm LED light. As well as the arrangement I imaged two of them using then 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. 69 images stacked in Zerene (Pmax).
Biddulphia pulchella S.F.Gray, nom. illeg., 1821. Published in: Gray, S.F. (1821). A natural arrangement of British plants, according to their relations to each other, as pointed out by Jussieu, De Candolle, Brown, &c. including those cultivated for use; with an introduction to botany, in which the terms newly introduced are explained; illustrated by figures. pp. vol. 1: [i]-xxviii, [1]- 824, pls I-XXI plates. London: Printed for Baldwin, Cradock & Joy, Paternoster-Row. Page 294. This name is currently regarded as a synonym of Biddulphia biddulphiana (J.E.Smith) Boyer, 1900. Published in: Boyer, C.S. (1901 ‘1900’). The biddulphoid forms of North American Diatomaceae. Proceedings of the Academy of Natural Sciences of Philadelphia 1900: 685-748. Page 694.