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| Fragilaria brevistriata Grunow in Van Heurck 1885 |
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| Fragilaria crotonensis var. prolongata (Grunow) Van Heurck 1885 |
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| Gomphonema augur var. gautieri Van Heurck 1885 |
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| Gomphonema gracile var. auritum (A. Brun) Van Heurck 1885 |
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| Gomphonema gracile var. dichotomum (W. Smith) Van Heurck 1885 |
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| Gomphonema montanum var. commutatum (Grunow in Van Heurck) Grunow in Van Heurck 1885 |
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| Gomphonema olivaceum f. vulgaris (Kützing) Grunow in Van Heurck 1885 |
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| Grammatophora marina var. communis (Grunow) Van Heurck 1885 |
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| Grammatophora marina var. macilenta (W. Smith) Van Heurck 1885 |
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| Grammatophora marina var. subtilissima (J.W. Bailey ex Ralfs in Pritchard) Van Heurck 1885 |
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| Grammatophora marina var. vulgaris (Grunow) Van Heurck 1885 |
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| Melosira crenulata f. binderana (Kützing) Van Heurck 1885 |
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| Melosira crenulata f. tenuis (Kützing) Van Heurck 1885 |
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| Melosira juergensii (juergensi) var. octagona Grunow in Van Heurck 1885 |
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| Micropodiscus weissflogii (Grunow in Van Heurck) Grunow in Van Heurck 1885 |
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| Navicula brevis var. elliptica Van Heurck 1885 |
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| Navicula cancellata var. ammophila (Grunow) Van Heurck 1885 |
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| Navicula cancellata var. scaldensis Van Heurck 1885 |
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| Navicula cari var. angusta (Grunow) Grunow in Van Heurck 1885 |
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| Navicula cincta f. minuta Van Heurck 1885 |
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