A strew slide of Biddulphia aurita. No location or makers name. Olympus BHB microscope using 450nm LED light. As well as the wider strew, I imaged two (one side view, the other a top down view) with the 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. 57 images stacked in Zerene (Pmax).
Biddulphia aurita (Lyngbye) Brébisson 1838. Published in: Brébisson, A. de (1838). Études microscopiques. Considérations sur les Diatomées et essai d’une classification des genres et des espèces appartenant à cette famille. Mémoires de la Société Académique, Agricole, Industrielle et d’Instruction de l’Arrondissements de Falaise 1: 27-46, 148-149 (=Corrections et additions au mémoire sur les Diatomées). Page 38. This name is currently regarded as a synonym of Odontella aurita (Lyngbye) C.Agardh 1832. Published in: Agardh, C.A. (1832). Conspectus criticus diatomacearum. Part 4. pp. 49-66. Lundae [Lund]: Literis Berlingianus. Page 56.