| WebNameShort | |
| Achnanthes conspicua Mayer 1919 |
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| Achnanthidium lanceolatum var. rhomboidale Mayer 1919 |
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| Achnanthidium lanceolatum var. rostellatum ‘Hustedt’ according to Mayer 1919 |
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| Amphora coffeaeformis var. thumensis Mayer 1919 |
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| Anomoeoneis exilis var. genuina Mayer 1919 |
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| Anomoeoneis exilis var. lanceolata Mayer 1919 |
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| Anomoeoneis exilis f. subacuminata Mayer 1919 |
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| Caloneis alpestris sensu Mayer 1919 |
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| Caloneis alpestris var. genuina Mayer 1919 |
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| Caloneis alpestris var. lanceolata Mayer 1919 |
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| Ceratoneis arcus var. incisa Mayer 1919 |
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| Ceratoneis arcus f. undulata Mayer 1919 |
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| Cocconeis flexella var. appendiculata Mayer 1919 |
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| Cocconeis thumensis Mayer 1919 |
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| Cyclotella comta f. evidenterpunctata Mayer 1919 |
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| Cyclotella comta var. ovalis (Fricke) Mayer 1919 |
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| Cyclotella melosiroides var. clavigera Mayer 1919 |
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| Cymbella aequalis var. genuina Mayer 1919 |
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| Cymbella aequalis var. platycephala Mayer 1919 |
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| Cymbella aequalis var. subaequalis (Grunow in Van Heurck) Mayer 1919 |
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