| WebNameShort | |
| Navicula contenta f. biceps (Arnott Ms., Grunow in Van Heurck) Hustedt 1930 |
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| Surirella ovata var. crumena (Brébisson ex Kützing) Hustedt 1930 |
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| Anomoeoneis serians var. brachysira (Brébisson in Rabenhorst) Hustedt 1930 |
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| Eucocconeis flexella var. alpestris (Brun) Hustedt 1930 |
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| Gomphocymbella ancyli (Cleve) Hustedt 1930 |
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| Navicula elegans f. cuspidata (Cleve) Hustedt 1930 |
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| Neidium iridis f. maxima (Cleve) Hustedt 1930 |
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| Pinnularia acrosphaeria f. undulata (Cleve) Hustedt 1930 |
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| Pinnularia mesolepta f. angusta (angustata) (Cleve) Hustedt 1930 |
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| Achnanthes oestrupii (Cleve-Euler) Hustedt 1930 |
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| Stauroneis phoenicenteron f. brevis (Dippel) Hustedt 1930 |
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| Stauroneis phoenicenteron f. gracilis (Dippel) Hustedt 1930 |
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| Amphora ovalis f. gracilis (Ehrenberg) Hustedt 1930 |
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| Eunotia pectinalis f. impressa (Ehrenberg) Hustedt 1930 |
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| Pinnularia gibba var. mesogongyla (Ehrenberg) Hustedt 1930 |
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| Pinnularia gibba var. parva (Ehrenberg) Hustedt 1930 |
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| Stauroneis anceps f. gracilis (Ehrenberg) Hustedt 1930 |
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| Stauroneis anceps f. linearis (Ehrenberg) Hustedt 1930 |
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| Diatoma vulgare var. ovalis (Fricke in Schmidt et al.) Hustedt 1930 |
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| Gomphonema helveticum var. tenuis (Fricke in Schmidt et al.) Hustedt 1930 |
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