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| Rhopalodia musculus var. constricta (Brebisson in W. Smith) Peragallo & Peragallo 1900 |
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| Rhopalodia succincta (Brebisson) Peragallo & Peragallo 1900 |
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| Rhopalodia musculus var. gibberula (Ehrenberg) Peragallo & Peragallo 1900 |
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| Nitzschia clevei (Grunow in Cleve & Grunow) Peragallo & Peragallo 1900 |
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| Nitzschiella incerta (Grunow in Cleve & Grunow) Peragallo & Peragallo 1900 |
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| Nitzschiella lorensiana var. subtilis (Grunow in Cleve & Grunow) Peragallo & Peragallo 1900 |
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| Nitzschiella lorensiana (Grunow in Cleve & Moller; Grunow in Cleve & Grunow) Peragallo & Peragallo 1900 |
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| Nitzschia lanceolata var. minor (Grunow in Van Heurck) Peragallo & Peragallo 1900 |
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| Nitzschiella incurva (Grunow) Peragallo & Peragallo 1900 |
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| Rhopalodia gibba var. parallela (Grunow) Peragallo & Peragallo 1900 |
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| Rhopalodia musculus var. producta (Grunow) Peragallo & Peragallo 1900 |
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| Nitzschia rigida (Kützing) Peragallo & Peragallo 1900 |
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| Rhopalodia gibba var. ventricosa (Kützing) Peragallo & Peragallo 1900 |
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| Synedra fulgens var. gigantea (Lobarzewsky) Peragallo & Peragallo 1900 |
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| Synedra crystallina var. conspicua Grunow ex H. Peragallo & M. Peragallo 1900 |
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| Nitzschia weissflogii (weisflogii) var. glabrata Grunow in Peragallo & Peragallo 1900 |
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| Nitzschia angularis f. minor Peragallo & Peragallo 1900 |
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| Nitzschia armoricana Peragallo & Peragallo 1900 |
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| Nitzschia insignis var. niceaensis Peragallo & Peragallo 1900 |
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| Nitzschia lanceolata var. incrassata Peragallo & Peragallo 1900 |
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