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| Fragilaria vaucheriae f. imperfecta (Cleve-Euler) Cleve-Euler 1953 |
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| Fragilaria virescens var. sphaerophora (Cleve-Euler) Cleve-Euler 1953 |
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| Rhabdonema arcuatum f. maxima (Cleve-Euler) Cleve-Euler 1953 |
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| Rhabdonema minutum var. oestrupii (Cleve-Euler) Cleve-Euler 1953 |
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| Rouxia californica var. minuta (Cleve-Euler) Cleve-Euler 1953 |
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| Synedra tenera var. acicularis (Cleve-Euler) Cleve-Euler 1953 |
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| Fragilaria construens var. binodis (Ehrenberg & Grunow em.) Cleve-Euler 1953 |
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| Diatoma hiemale (hyemale) var. anceps (Ehrenberg) Cleve-Euler 1953 |
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| Eunotia diadema var. tetraodon (Ehrenberg) Cleve-Euler 1953 |
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| Eunotia polyglyphis f. hexaglyphis (Ehrenberg) Cleve-Euler 1953 |
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| Eunotia polyglyphis f. pentaglyphis (Ehrenberg) Cleve-Euler 1953 |
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| Eunotia polyglyphis f. septenaria (Ehrenberg) Cleve-Euler 1953 |
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| Eunotia sarekensis var. papilio (Ehrenberg) A. Berg in man. Cleve-Euler 1953 |
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| Fragilaria producta var. acuta (Ehrenberg) Cleve-Euler 1953 |
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| Eunotia diadema (Ehrenberg, A. Berg em.) A. Cleve 1953 |
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| Eunotia gibbosa var. constricta (Fontell) A. Berg in Cleve-Euler 1953 |
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| Eunotia hyperborea var. astridae (Fontell) A. Berg in man. Cleve-Euler 1953 |
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| Eunotia hyperborea var. dentata (Fontell) Cleve-Euler 1953 |
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| Eunotia jemtlandica (Fontell) Cleve-Euler 1953 |
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| Rhabdonema arcuatum f. contracta (Fricke in Schmidt et al.) Cleve-Euler 1953 |
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