| WebNameShort | |
| Gomphonema longiceps var. subclavata (Grunow) Hustedt 1930 |
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| Gomphonema longiceps f. suecica (Grunow in Van Heurck) Hustedt 1930 |
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| Gomphonema olivaceum var. minutissima Hustedt 1930 |
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| Gyrosigma peisonis (Grunow) Hustedt 1930 |
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| Hantzschia virgata var. gracilis Hustedt 1930 |
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| Melosira granulata f. curvata Hustedt 1930 |
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| Melosira granulata var. muzzanensis (Meister) Hustedt 1930 |
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| Melosira granulata f. spiralis Hustedt 1930 |
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| Navicula bacillum var. rostrata (Mayer) Hustedt 1930 |
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| Navicula bicontracta sensu Hustedt 1930 |
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| Navicula contempta Krasske 1930 |
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| Navicula contenta f. biceps (Arnott Ms., Grunow in Van Heurck) Hustedt 1930 |
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| Navicula contenta f. elliptica (Krasske) Krasske in Hustedt 1930 |
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| Navicula contenta f. parallela (Petersen) Hustedt 1930 |
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| Navicula creuzburgensis Krasske in Hustedt 1930 |
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| Navicula dicephala var. neglecta (Krasske) Hustedt 1930 |
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| Navicula disjuncta Hustedt 1930 |
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| Navicula elegans f. cuspidata (Cleve) Hustedt 1930 |
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| Navicula excelsa Krasske in Hustedt 1930 |
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| Navicula graciloides A. Mayer in Hustedt 1930 |
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