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| Navicula mutica var. cohnii (Hilse) Grunow in Van Heurck 1880 |
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| Cocconeis dirupta var. flexella (Janisch & Rabenhorst) Grunow in Van Heurck 1880 |
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| Gomphonema gracile var. dichotomum (Kutzing partim.; W. Smith) Grunow in Van Heurck 1880 |
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| Achnanthes microcephala (Kützing) Grunow in Van Heurck 1880 |
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| Gomphonema acuminatum var. brebissonii (Kützing) Grunow in Van Heurck 1880 |
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| Gomphonema angustatum var. obtusatum (Kützing) Grunow in Van Heurck 1880 |
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| Gomphonema constrictum var. italicum (Kützing) Grunow in Van Heurck 1880 |
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| Gomphonema exiguum var. digitatum (Kützing) Grunow in Van Heurck 1880 |
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| Gomphonema exiguum var. telographicum (Kützing) Grunow in Van Heurck 1880 |
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| Gomphonema intricatum var. dichotomum (Kützing) Grunow in Van Heurck 1880 |
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| Gomphonema obtusatum (Kützing) Grunow in Van Heurck 1880 |
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| Gomphonema parvulum (Kützing) Van Heurck 1880 |
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| Navicula confervacea (Kützing) Grunow in Van Heurck 1880 |
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| Navicula rhynchocephala (rhyncocephala) var. amphiceros (Kützing) Grunow in Van Heurck 1880 |
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| Schizonema apiculatum var. fastigiatum (fastigatum) (Kützing) Grunow in Van Heurck 1880 |
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| Schizonema ramosissimum var. polyclados (Kützing) Grunow in Van Heurck 1880 |
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| Achnanthes linearis var. jackii (Rabenhorst) Grunow in Van Heurck 1880 |
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| Encyonema caespitosum var. auerswaldii (Rabenhorst) Van Heurck 1880 |
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| Navicula rotaeana (Rabenhorst) Grunow in Van Heurck 1880 |
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| Achnanthes trinodis (Ralfs in Pritchard) Grunow in Van Heurck 1880 |
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