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| Caloneis fasciata var. notata A. Cleve 1922 |
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| Campylodiscus hibernicus var. minor Cleve-Euler 1922 |
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| Cymbella bernensis var. minuta Cleve-Euler 1922 |
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| Cymbella ehrenbergii var. hungarica Cleve-Euler in Cleve-Euler & Osvald 1922 |
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| Cymbella ehrenbergii var. stricta Cleve-Euler in Cleve-Euler & Osvald 1922 |
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| Diploneis carpathorum (Pantocsek) Cleve-Euler 1922 |
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| Diploneis maeandra Cleve-Euler 1922 |
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| Diploneis oblongella (Naegeli in Kutzing) Cleve-Euler in Cleve-Euler (& Osvald) 1922 |
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| Diploneis oblongella var. alpha Cleve-Euler in Cleve-Euler & Backman 1922 |
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| Diploneis subrhombica Cleve-Euler 1922 |
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| Epithemia zebra var. uncinata Cleve-Euler 1922 |
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| Eunotia scandinavica Cleve-Euler 1922 |
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| Fragilaria construens var. trigona (Brun & Heribaud in Heribaud) Cleve-Euler 1922 |
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| Fragilaria mutabilis var. linearis A. Cleve-Euler 1922 |
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| Melosira italica var. muzzanensis Cleve-Euler 1922 |
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| Nitzschia tryblionella var. subconstricta Cleve-Euler 1922 |
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| Pinnularia biclavata Cleve-Euler 1922 |
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| Pinnularia biclavata var. abbreviata Cleve-Euler 1922 |
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| Pinnularia biclavata var. minor (Cleve) Cleve-Euler in Bachman & Cleve-Euler 1922 |
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| Pinnularia hemiptera var. pumila Cleve-Euler 1922 |
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