| WebNameShort | |
| Cymbella cuspidata var. elliptica (Prudent) Mayer 1917 |
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| Cymbella turgida var. angustior Mayer 1917 |
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| Cymbella turgida var. genuina Mayer 1917 |
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| Gomphonema gracile f. cymbelloides (Grunow ms. in Cleve) Mayer 1917 |
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| Gomphonema gracile f. cymbelloides (Grunow ms. in Cleve) Mayer 1917 |
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| Gyrosigma scalproides var. curta Mayer 1917 |
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| Neidium affine var. subrostratum Mayer 1917 |
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| Neidium affine var. tenuirostris Mayer 1917 |
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| Neidium iridis var. minor Mayer 1917 |
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| Nitzschia elongata var. minor Mayer 1917 |
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| Pinnularia amphicephala Mayer 1917 |
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| Pinnularia gibba var. semicruciata Mayer 1917 |
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| Pinnularia mesolepta var. vasta Mayer 1917 |
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| Pinnularia polyonca var. intermedia Mayer 1917 |
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| Stauroneis anceps f. maior (major) Mayer 1917 |
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| Surirella birostrata Mayer 1917 |
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