| WebNameShort | |
| Navicula subacuta (Ehrenberg) Ralfs in Pritchard 1861 |
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| Navicula subcapitata (Gregory) Ralfs in Pritchard 1861 |
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| Navicula suborbicularis (Gregory) Ralfs in Pritchard 1861 |
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| Navicula subtilis (Gregory) Ralfs in Pritchard 1861 |
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| Navicula taeniata (Ehrenberg) Ralfs in Pritchard 1861 |
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| Navicula trigonocephala (Ehrenberg) Ralfs in Pritchard 1861 |
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| Navicula undulata Ralfs in Pritchard 1861 |
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| Navicula vespa (Ehrenberg) Ralfs in Pritchard 1861 |
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| Nitzschia amphilepta (Ehrenberg; Ehrenberg) Ralfs in Pritchard 1861 |
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| Nitzschia brightwellii Kitton in Pritchard 1861 |
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| Nitzschia constricta (Kützing) Ralfs in Pritchard 1861 |
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| Nitzschia curvula (Kützing) Ralfs in Pritchard 1861 |
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| Nitzschia dianae (Ehrenberg) Ralfs in Pritchard 1861 |
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| Nitzschia ehrenbergii Ralfs in Pritchard 1861 |
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| Nitzschia entomon (Ehrenberg) Ralfs in Pritchard 1861 |
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| Nitzschia gigantea (Ehrenberg) Ralfs in Pritchard 1861 |
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| Nitzschia italica (Rabenhorst) Ralfs in Pritchard 1861 |
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| Nitzschia latestriata (Brébisson in Kützing) Ralfs in Pritchard 1861 |
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| Nitzschia smithii Ralfs in Pritchard 1861 |
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| Nitzschia spectabilis (Ehrenberg) Ralfs in Pritchard 1861 |
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