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| Stauroneis phoenicenteron var. nobilis (Schumann) Zabelina in Proschkina-Lavrenko 1950 |
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| Achnanthes lanceolata var. baicalensis (Skvortzow & Meyer) Sheshukova in Proshkina-Lavrenko 1950 |
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| Gomphonema baicalense (baicalensis) (Skvortzow & Meyer) Proschkina-Lavrenko 1950 |
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| Gomphonema eriense f. baicalense (Skvortzow & Meyer) Proschkina-Lavrenko 1950 |
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| Gomphonema eriense f. hastata (Skvortzow & Meyer) Proschkina-Lavrenko 1950 |
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| Diploneis skvortzovii (skvortowii) var. punctata (Skvortzow) Zabelina in Proschkina-Lavrenko 1950 |
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| Diploneis smithii f. baicalensis (Skvortzow) Zabelina in Proschkina-Lavrenko 1950 |
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| Eunotia monodon var. hankensis (Skvortzow) Scheschukova in Proschkina-Lavrenko 1950 |
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| Nitzschia fonticola var. baicalensis (Skvortzow) Kisselev in Proschkina-Lavrenko 1950 |
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| Surirella robusta f. hankensis (Skvortzow) Kisselev in Proschkina-Lavrenko 1950 |
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| Campylodiscus decorus var. ralfsii (W. Smith) Kisselev in Proshkina-Lavrenko 1950 |
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| Gyrosigma fasciola (fasciolum) var. prolongatum (W. Smith) Proschkina-Lavrenko 1950 |
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| Asterionella gracillima var. zigzagostellata ‘(Elenkin) Wislouch’ according to Proshkina-Lavrenko 1950 |
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| Achnanthes brevipes var. biareolata ‘Mereschkowsky’ according to Proschkina-Lavrenko 1950 |
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| Fragilaria mediterranea var. aralensis Borszcow (Borsczew) 1950 |
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| Surirella (Suriraya) cibrile Ehrenberg ex Proschkina-Lavrenko 1950 |
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| Eunotia monodon var. latestriata Jouravleva in Proschkina-Lavrenko 1950 |
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| Pinnularia nodosa var. palibinii Poretsky ex Proschkina-Lavrenko 1950 |
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| Opephora martyi var. amphioxys Poretsky in Proschkina-Lavrenko 1950 |
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| Cymbella nurnussiensis Poretzky & Proschkina-Lavrenko 1950 |
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