| WebNameShort | |
| Diatoma elongatum var. pachycephala (Grunow in Van Heurck) Hustedt 1931 |
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| Dimeregramma (Dimerogramma) marinum f. lanceolata (Peragallo & Peragallo) Hustedt 1931 |
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| Fragilaria alpestris Krasske in Hustedt 1931 |
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| Fragilaria atomus Hustedt 1931 |
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| Fragilaria constricta f. stricta (A. Cleve) Hustedt 1931 |
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| Fragilaria constricta f. tetranodis (A. Cleve) Hustedt 1931 |
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| Fragilaria constricta var. trinodis Hustedt 1931 |
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| Fragilaria inflata (Heiden) Hustedt 1931 |
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| Fragilaria inflata var. istvanffyi (Pantocsek) Hustedt 1931 |
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| Fragilaria leptostauron (Ehrenberg) Hustedt 1931 |
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| Fragilaria leptostauron var. dubia (Grunow) Hustedt 1931 |
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| Fragilaria leptostauron var. rhomboides (Grunow) Hustedt 1931 |
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| Fragilaria pinnata f. bullata (Østrup) Hustedt 1931 |
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| Fragilaria pinnata f. capitata (Krieger) Hustedt 1931 |
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| Fragilaria pinnata var. intercedens (Grunow in Van Heurck) Hustedt 1931 |
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| Glyphodesmis williamsonii f. lanceolata (Peragallo & Peragallo) Hustedt 1931 |
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| Grammatophora oceanica f. intermedia (Grunow) Hustedt 1931 |
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| Grammatophora oceanica f. nodulosa (Grunow) Hustedt 1931 |
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| Grammatophora oceanica f. subtilissima (J.W. Bailey ex Ralfs in Pritchard) Hustedt 1931 |
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| Grammatophora oceanica f. vulgaris (Grunow) Hustedt 1931 |
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