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| Licmophora remuloides Mereschkowsky 1901 |
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| Licmophora thumii Mereschkowsky 1901 |
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| Navicula directa var. heterostriata Mereschkowsky 1901 |
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| Navicula reticulata Mereschkowsky 1901 |
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| Navicula rhaphoneis (Ehrenberg) Ralfs 1901 |
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| Nitzschia incolor Mereschkowsky 1901 |
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| Nitzschia spiralis Mereschkowsky 1901 |
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| Nitzschiella biplacata var. pacifica Mereschkowsky 1901 |
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| Nitzschiella californica Mereschkowsky 1901 |
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| Nitzschiella gracilis Mereschkowsky 1901 |
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| Nitzschiella gracilis var. reversa Mereschkowsky 1901 |
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| Nitzschiella lorensiana var. incurva (Grunow in Cleve & Grunow) Mereschkowsky 1901 |
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| Nitzschiella tenuirostris Mereschkowsky 1901 |
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| Nitzschiella tenuirostris f. directa Mereschkowsky 1901 |
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| Nitzschiella tenuirostris var. hamulifera Mereschkowsky 1901 |
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| Nitzschiella tenuirostris var. hamulifera Mereschkowsky 1901 |
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| Nitzschiella tenuirostris f. minutissima Mereschkowsky 1901 |
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| Nitzschiella tenuirostris var. parva Mereschkowsky 1901 |
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| Podosira fusca Mereschkowsky 1901 |
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| Rhabdonema gibbosum C. Mereschkowsky 1901 |
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