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| Peronia heribaudi var. minima Cleve-Euler 1939 |
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| Pinnularia bicapitata var. inaequalis Cleve-Euler 1939 |
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| Pinnularia dactylus var. subundulata Cleve-Euler 1939 |
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| Pinnularia divergens f. biconstricta Cleve-Euler 1939 |
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| Pinnularia hybrida f. acuminata, triangulata Cleve-Euler 1939 |
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| Pinnularia subcapitata f. subconstricta Cleve-Euler 1939 |
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| Stauroneis achnanthoides Cleve-Euler 1939 |
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| Stauroneis anceps var. fennica Cleve-Euler 1939 |
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| Stauroneis bottnica Cleve-Euler 1939 |
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| Stauroneis parvula var. biundulata Cleve-Euler 1939 |
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| Stauroneis parvula f. lapponica Cleve-Euler 1939 |
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| Stauroneis smithii f. acuminata Cleve-Euler 1939 |
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| Stenopterobia arctica Cleve-Euler 1939 |
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| Surirella islandica f. constricta Cleve-Euler 1939 |
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| Surirella nana var. pantocsekii Cleve-Euler 1939 |
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| Surirella simplex Cleve-Euler 1939 |
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| Surirella simplex var. latior Cleve-Euler 1939 |
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| Synedra amphicephala var. imperfecta Cleve-Euler 1939 |
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| Synedra filiformis var. exilis Cleve-Euler 1939 |
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| Synedra imperfecta Cleve-Euler 1939 |
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