additional sourceWilliams, D. M. (2023). Notes on the diatom collection of the Natural History Museum, London (BM) IX: Campylodiscus hardmanianus, with a discussion on synapomorphy and the poverty of molecular monophyly. <em>Phytotaxa.</em> 629(1): 53-64., available online athttps://doi.org/10.11646/phytotaxa.629.1.4 page(s): 57 [details] Available for editors [request]