| WebNameShort | |
| Navicula cryptocephala f. veneta (Kützing) Hustedt 1957 |
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| Rhopalodia gibba f. ventricosa (Kützing) Hustedt 1957 |
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| Synedra acus f. radians (Kützing) Hustedt 1957 |
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| Synedra ulna f. biceps (Kützing) Hustedt 1957 |
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| Synedra ulna f. danica (Kützing) Hustedt 1957 |
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| Eunotia lunaris f. subarcuata (Naegeli in Kutzing) Hustedt 1957 |
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| Achnanthes lanceolata f. rostrata (Østrup) Hustedt 1957 |
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| Navicula oblonga f. subcapitata (Pantocsek) Hustedt 1957 |
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| Stauroneis smithii f. incisa (Pantocsek) Hustedt 1957 |
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| Rhaphoneis surirella f. australis (Petit) Hustedt 1957 |
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| Rhaphoneis surirella f. subsalina (Petit) Hustedt 1957 |
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| Fragilaria capucina f. mesolepta (Rabenhorst) Hustedt 1957 |
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| Eunotia pectinalis f. undulata (Ralfs) Hustedt 1957 |
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| Fragilaria construens f. triundulata (Reichelt ex Hartz & Ostrup) Hustedt 1957 |
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| Caloneis bacillum f. lancettula (Schulz) Hustedt 1957 |
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| Fragilaria pinnata f. lancettula (Schumann) Hustedt 1957 |
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| Navicula crucicula f. rostrata (Tarnavschi) Hustedt 1957 |
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| Pinnularia microstauron f. diminuta Grunow ex Hustedt 1957 |
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| Cyclotella nana Hustedt 1957 |
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| Navicula bremensis Hustedt 1957 |
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