Eunotia pectinalis (Kützing) Rabenhorst, 1864 (original description)
Eunotia pectinalis f. minores Hustedt in Schmidt et al., 1911 (original description)
Eunotia polygyphis var. pentaglyphis (Ehrenberg) Grunow in A. Schmidt, 1911 accepted as Eunotia pentaglyphis Ehrenberg, 1854 (new combination reference)
Eunotia robusta var. decaodon (Ehrenberg) F.Hustedt, 1911 accepted as Eunotia decaodon Ehrenberg, 1840 (new combination reference)
Eunotia robusta var. dodecaodon (Ehrenberg) Ralfs, 1861 accepted as Eunotia dodecaodon Ehrenberg, 1854 (new combination reference)
Eunotia robusta var. enneodon (Ehrenberg) Hustedt in Schmidt, 1911 accepted as Eunotia enneodon Ehrenberg, 1840 (new combination reference)
Eunotia robusta var. heptodon (Ehrenberg) F.Hustedt, 1911 accepted as Eunotia heptodon Ehrenberg, 1840 (new combination reference)
Eunotia robusta var. octodon (Ehrenberg) Hustedt, 1911 accepted as Eunotia octodon Ehrenberg, 1840 (new combination reference)
Eunotia robusta var. polyodon (Ehrenberg) Ralfs, 1861 accepted as Eunotia polyodon Ehrenberg, 1845 (new combination reference)
Eunotia robusta var. prionotis (Ehrenberg) F.Hustedt, 1911 accepted as Eunotia prionotus Ehrenberg, 1840 (new combination reference)
Navicula digitoradiata var. elliptica Hustedt in Schmidt et al., 1911 (original description)
Tetracyclus lacustris var. capitatus Hustedt in Schmidt et al., 1911 (original description)
Tetracyclus lacustris var. rhombicus Hustedt in Schmidt et al., 1911 (original description)