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| Cymbella turgida var. maxima Cleve-Euler 1922 |
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| Fragilaria mutabilis var. asymmetrica A. Cleve-Euler 1922 |
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| Gomphonema angustatum f. hetermorpha Cleve-Euler 1922 |
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| Melosira italica var. subtilis Cleve-Euler 1922 |
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| Melosira lyrata (lirata) var. exigua Cleve-Euler 1922 |
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| Navicula digitoradiata sensu Cleve-Euler 1922 |
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| Navicula laevis Cleve-Euler 1922 |
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| Navicula radians (Østrup) Cleve-Euler 1922 |
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| Navicula radians var. suecica Cleve-Euler 1922 |
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| Navicula sandegrenii Cleve-Euler 1922 |
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