Williams, 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”, Phytotaxa. Auckland, New Zealand, 629(1), pp. 53–64. doi: 10.11646/phytotaxa.629.1.4.