| WebNameShort | |
| Ceratoneis arcus Holmboe 1899 |
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| Ceratoneis arcus Holmboe 1899 |
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| Ceratoneis arcus f. curta Holmboe 1899 |
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| Ceratoneis arcus var. genuina Holmboe 1899 |
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| Ceratoneis arcus var. linearis Holmboe 1899 |
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| Encyonema reflexum Holmboe 1899 |
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| Gomphonema acuminatum f. rectangulata Holmboe 1899 |
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| Gomphonema geminatum var. norvegica Holmboe 1899 |
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| Gomphonema parvulum var. minutissima Holmboe 1899 |
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| Neidium huitfeldtii Holmboe 1899 |
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| Rhopalodia gibba var. parallela (Grunow) Holmboe 1899 |
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| Surirella ovata f. angustior Holmboe 1899 |
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| Tabellaria flocculosa var. pelagica Holmboe 1899 |
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| Tetracyclus lacustris var. ovalis Holmboe 1899 |
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| Vanheurckia rhomboides var. saxonica (Rabenhorst) Holmboe 1899 |
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