Entogonia davyana from Springfield, Barbados. Single example on the slide. Described as ‘rare’. 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. 76 images stacked in Zerene (Pmax).
Entogonia davyana (Greville) Greville 1863. Published in: Greville, R.K. (1863). Descriptions of new and rare diatoms. Series X. Quarterly Journal of Microscopical Science, Series 2 3: 227-237, pls IX, X. Page 236, no fig. However also see Triceratium davyanum Greville 1862. Published in: Greville, R.K. (1862). Descriptions of new and rare Diatoms. Series VII. Quarterly Journal of Microscopical Science, New Series, London 2: 231-236, pl. X. Page 232, Plate X [10], Figure 4.
Also see: Holmes, R.W. & Brigger, A.L. (1979). The marine fossil diatom genus Entogonia Greville – A review. Bacillaria 2: 155-214.