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| Achnanthes leonardii A. Witkowski & H. Lange-Bertalot in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Achnanthes placentuloides (Guslakov in Guslakov et al.) A. Witkowski & H. Lange-Bertalot in Witkowski, Lange-Bertalot & Metzeltin 2000 |
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| Amicula specululum (A. Witkowski) A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Amphora jostesorum A. Witkowski, D. Metzeltin & H. Lange-Bertalot in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Amphora tomiakae A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Anaulus simonsenii A. Witkowski & D. Metzeltin in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Astartiella glacialis A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Astartiella iks A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Astartiella producta A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Austariella admissa (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Austariella jamalinensis (Cleve in Cleve & Grunow) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Austariella jamalinensis var. subcircularis (Østrup) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Bacillaria paxillifera var. tumidula (Grunow) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Biremis circumtexta (Meister ex Hustedt) H. Lange-Bertalot & A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Biremis solitaria (Cleve) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Brachysira estonarium A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Catenula robusta A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Chamaepinnularia alexandrowiczii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Chamaepinnularia clamans (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Chamaepinnularia distantepunctata (Simonsen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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