Williams, D.M. & Sims, P.A. (2023)

Notes on the diatom collection of the Natural History Museum, London (BM) VII: An account of some original specimens of Pyrgodiscus (Bacillariophyta) with notes on Stephanogonia (Bacillariophyta)

. Phytotaxa 589 (3): 213–229. https://doi.org/10.11646/phytotaxa.589.3.1