| WebNameShort | |
| Navicula bacillum f. gregoryana (Cleve & Grunow) Hustedt 1961 |
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| Navicula pupula f. rectangularis (Gregory) Hustedt 1961 |
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| Navicula vegae f. subconstricta (Grunow in Cleve & Möller) Hustedt 1961 |
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| Navicula fasciculata (Grunow) Hustedt 1961 |
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| Navicula lorenzii (Grunow) Hustedt 1961 |
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| Navicula hustedtii f. obtusa (Hustedt in Schmidt et al.) Hustedt 1961 |
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| Navicula pupula f. elliptica (Hustedt) Hustedt 1961 |
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| Navicula pupula f. rostrata (Hustedt) Hustedt 1961 |
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| Navicula ventralis f. simplex (Hustedt) Hustedt 1961 |
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| Navicula wittrockii f. cruciata (Hustedt) Hustedt 1961 |
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| Navicula jungii (jungi) f. inflata (Krasske) Hustedt 1961 |
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| Navicula levanderi f. capitata (Krasske) Hustedt 1961 |
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| Navicula tridentula f. parallela (Krasske) Hustedt 1961 |
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| Navicula americana f. minor (M. Peragallo & Héribaud in Héribaud) Hustedt 1961 |
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| Navicula scopulorum f. triundulata (Meister ex Hustedt in Schmidt et al.) Hustedt 1961 |
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| Navicula bacillum f. lanceolata (Østrup) Hustedt 1961 |
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| Navicula halophila f. subcapitata (Østrup) Hustedt 1961 |
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| Navicula wittrockii f. fusticulus (Østrup) Hustedt 1961 |
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| Navicula scopulorum f. belgica (Van Heurck) Hustedt 1961 |
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| Navicula americana f. lignitica Hustedt 1961 |
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