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Cymbella leptoceras f. curta "Grunow" Mayer 1919 |
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Synedra ulna f. bicurvata (Biene ex Rabenhorst) Mayer 1919 |
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Cyclotella comta var. ovalis (Fricke) Mayer 1919 |
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Fragilaria pinnata var. intermedia (Grunow in litt., Grunow) Mayer 1919 |
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Cymbella aequalis var. subaequalis (Grunow in Van Heurck) Mayer 1919 |
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Gomphonema subclavatum var. commutatum (Grunow in Van Heurck) Mayer 1919 |
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Neidium dubium var. peisonis (Grunow) Mayer 1919 |
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Nitzschia amphioxys var. amphilepta (Grunow) Mayer 1919 |
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Surirella ovalis f. ovata (Kützing) Mayer 1919 |
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Fragilaria construens f. subrotunda (Mayer) Mayer 1919 |
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Fragilaria construens var. subrotunda (Mayer) Mayer 1919 |
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Gomphonema olivaceum var. inflata (Mayer) Mayer 1919 |
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Gomphonema olivaceum f. minutulum (minutula) (Mayer) Mayer 1919 |
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Achnanthidium lanceolatum var. rostellatum ‘Hustedt’ according to Mayer 1919 |
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Achnanthes conspicua Mayer 1919 |
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Achnanthidium lanceolatum var. rhomboidale 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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