FIGURES 19–29. Figures 19, 20 in 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

FIGURES 19–29. Figures 19, 20: Specimens of Campylodiscus hardmanianus var. grovei Deby from BM Adams GC829, 'Derbend', Caspian Sea, Russia, scaLe bar = 20μm. Figures 21, 22: Specimens of Campylodiscus hardmanianus var. grovei Deby from BM 53492, 'Derbent', Caspian Sea, Russia, scale bar = 50μm. Figure 23: Specimen (?) of 'C. sonderianus' from BM 35870, 'TypeN-PLatte | I.D. MöLLer', scaLe bar = 50μm. Figure 24: Reproduction of the published name (designation) for 'Campylodiscus Sonderianus Grun. n. sp.' in Möller (1877, p. 13). Figures 25, 6: Specimens of Campylodiscus daemelianus from BM 26853, 'Yarra, Yarra', Australia (Van Heurck, Types du Synopsis des Diatomées de Belgique, No. 542 ('Yarra-Yarra (AUstraLie)', scaLe bar = 50μm. Figure 27: Specimen of Coronia echeneis from Wismar, Germany, BM 12875, Cleve & Möller, no. 115, 'Lebend im Hafen von Wismar', scaLe bar = 20μm. Figures 28, 9: Specimen of 'C. sonderianus' from BM 64450, 'ChaLLeNger StatioN 233', 'T.E.Doeg', scaLe bar = 50μm.