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| Eunotia lunaris var. alpina (Naegeli in Kutzing) Grunow in Van Heurck 1881 |
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| Eunotia lunaris var. subarcuata (Naegeli in Kutzing) Grunow in Van Heurck 1881 |
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| Denticula valida (Pedicino) Grunow in Van Heurck 1881 |
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| Nitzschia sigma var. rigidula (Peragallo & Peragallo) Grunow in Van Heurck 1881 |
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| Dimeregramma (Dimerogramma) surirella var. australis (Petit) Grunow in Van Heurck 1881 |
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| Rhaphoneis (Raphoneis) surirella var. australis (Petit) Grunow in Van Heurck 1881 |
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| Sceptroneis australis (Petit) Grunow in Van Heurck 1881 |
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| Nitzschia frustulum var. hantzschiana (Rabenhorst) Grunow in Van Heurck 1881 |
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| Nitzschia frustulum var. bulnheimiana (Rabenhorst; Rabenhorst) Grunow in Van Heurck 1881 |
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| Nitzschia frustulum var. perpusilla (Rabenhorst; Rabenhorst) Grunow in Van Heurck 1881 |
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| Nitzschia insignis var. smithii (Ralfs in Pritchard) Grunow in Van Heurck 1881 |
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| Synedra pulchella (Ralfs in Pritchard) Van Heurck 1881 |
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| Fragilaria vitrea var. minima (Ralfs) Grunow in Van Heurck 1881 |
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| Meridion circulare var. constricta (constrictum) (Ralfs) Van Heurck 1881 |
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| Campylosira cymbelliformis (Schmidt) Grunow in Van Heurck 1881 |
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| Fragilaria mutabilis var. elliptica (Schumann) Grunow in Van Heurck 1881 |
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| Asterionella formosa var. ralfsii (W. Smith) Grunow in Van Heurck 1881 |
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| Cymatopleura elliptica var. hibernica (W. Smith) Van Heurck 1881 |
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| Denticula tenuis var. inflata (W. Smith) Grunow in Van Heurck 1881 |
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| Fragilaria parasitica (W. Smith) Grunow in Van Heurck 1881 |
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