Figures 43–63.

Cymbella tumidula species complex 43 Original illustration provided by Grunow in Schmidt (1875, Pl. 9, Fig. 33), lectotype, here designated 44–49 Cymbella tumidula var. tumidula, specimens from Trieste in preparation BM 18543 49 Epitype, here designated 50–56 Cymbella tumidula var. tumidula [Cymbella affinis sensu Krammer (2002)], specimens from Trieste in preparation 1131G IOK 54 Isolectotype, designated here 57–63 Cymbella tumidula var. procera (Krammer) W.Silva, specimens from Serbia in preparation 714 IOK, holotype 57 Lectotype, designated here. Scale bar: 10 µm.