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| Caloneis amphisbaena var. compacta (A. Berg) Cleve-Euler 1955 |
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| Gomphonema constrictum f. elongata (A. Cleve) Cleve-Euler 1955 |
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| Pinnularia crucifera var. tenuis (A. Cleve) Cleve-Euler 1955 |
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| Pinnularia stomatophoroides var. ornata (A. Cleve) Cleve-Euler 1955 |
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| Pinnularia subrostrata (A. Cleve) Cleve-Euler 1955 |
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| Pinnularia termes var. stauroneiformis (A. Schmidt) Cleve-Euler 1955 |
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| Pinnularia lata var. linearis (Berg) Cleve-Euler 1955 |
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| Cymbella ventricosa var. silesiaca (Bleisch in Rabenhorst) Cleve-Euler 1955 |
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| Pinnularia borealis f. lanceolata (Boye Petersen) Cleve-Euler 1955 |
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| Pinnularia borealis f. ovalis (Boye Petersen) Cleve-Euler 1955 |
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| Pinnularia borealis f. schmidtii (Boye Petersen) Cleve-Euler 1955 |
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| Pinnularia borealis f. schmidtii (Boye Petersen) Cleve-Euler 1955 |
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| Pinnularia borealis f. subcapitata (Boye Petersen) Cleve-Euler 1955 |
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| Cymbella schmidtii var. conifera (Brun & Héribaud in Héribaud) Cleve-Euler 1955 |
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| Gomphonema mustela f. curvata (Brun et Peragallo) Cleve-Euler 1955 |
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| Cymbella lanceolata var. gibbosa (Brun) Cleve-Euler 1955 |
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| Gomphonema helveticum f. incurvata (Brun) Cleve-Euler 1955 |
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| Pinnularia brunii (bruni) var. robusta (Brun) Cleve-Euler 1955 |
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| Pinnularia lucida (Brun) Cleve-Euler 1955 |
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| Pinnularia pulchra var. magna (Brun) Cleve-Euler 1955 |
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