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| Navicula affinis f. maxima (Cleve) Fricke 1902 |
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| Navicula affinis f. media (Cleve) Fricke 1902 |
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| Navicula affinis f. minor (Cleve) Fricke 1902 |
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| Navicula ambigua var. digitus (Schmidt in Schmidt et al.) Fricke 1902 |
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| Navicula aspera var. contermina (Schmidt in Schmidt et al.) Fricke 1902 |
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| Navicula aspera var. genuina (Cleve) Fricke 1902 |
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| Navicula aspera var. neumeyeri (neumayeri) (Janisch in Schmidt et al.) Fricke 1902 |
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| Navicula aspera var. oblonga Fricke 1902 |
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| Navicula aspera var. pulchella (W. Smith) Fricke 1902 |
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| Navicula aspera var. residua (Schmidt in Schmidt et al.) Fricke 1902 |
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| Navicula aspera var. schmidtiana (Grunow in Schmidt et al.) Fricke 1902 |
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| Navicula aspera var. vulgaris (Cleve) Fricke 1902 |
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| Navicula bomboides var. madagascarensis (Cleve) Fricke 1902 |
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| Navicula bomboides var. moesta (Schmidt in Schmidt et al.) Fricke 1902 |
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| Navicula brebissonii var. notata (M. Peragallo & Heribaud in Heribaud) Fricke 1902 |
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| Navicula brevicostata (Cleve) Fricke 1902 |
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| Navicula brevicostata var. leptostauron (Cleve) Fricke 1902 |
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| Navicula castracanei var. petitiana (Grunow in Cleve) Fricke 1902 |
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| Navicula clepsydra var. scotia (Schmidt in Schmidt et al.) Fricke 1902 |
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| Navicula contigua var. eudoxia (Schmidt in Schmidt et al.) Fricke 1902 |
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