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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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| Chamaepinnularia justa (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Chamaepinnularia truncata (König) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Chamaepinnularia wiktoriae (A. Witkowski & H. Lange-Bertalot) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeiopsis breviata (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeiopsis fraudulenta (A. Schmidt in A. Schmidt et al.) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeiopsis girondica (König) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeiopsis kantsiensis (Giffen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeiopsis orthoneoides (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeiopsis patrickae (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeiopsis pseudorthoneides (Foged) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeiopsis pullus (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeiopsis regularis (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeiopsis wrightii (O’Meara) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeis capensis (Cholnoky) A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cocconeis irregularis (Schulz) A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cosmioneis eta (Cleve) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cymatoneis margarita A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Cymbellonitzschia szulczewskii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Dickieia resistans A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Dickieia wajdae A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Diploneis caffra (Giffen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Ehrenbergia granulosa (Grunow) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Ehrenbergia hauckii (Grunow in Van Heurck) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Entomoneis corrugata (Giffen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Entomoneis kjellmanii var. striolata (Cleve in Cleve & Grunow) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia balnearis (Grunow) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia cunoniae (Cholnoky) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia inscriptura (Hendey) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia marnieri (Manguin) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia melanocephala (Giffen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia minima (Østrup) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia nicobarica (Grunow) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia reichardtii (Grunow in Van Heurck) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia schoemaniana (Foged) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia spatiata (Østrup) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fallacia suspirii (Cholnoky) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fogedia acuta (Salah) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fogedia heterovalvata (Simonsen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fragilaria bronkei A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fragilaria pulchella var. constricta (Liebetanz) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fragilaria pulchella var. lanceolata (O’Meara) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fragilaria quebecensis (Poulin, Hudon & Cardinal) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Fragilariopsis reginae-jahniae A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Gomphoseptatum pseudoseptatum (Giffen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Hantzschia elegantula (Østrup) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Hantzschia kaiseri A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Haslea britannica (Hustedt & Aleem) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Hippodonta caotica A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Hyalinella lateripunctata A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Hyalosira delicatula var. gibbosa (Østrup) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Hyalosira parietina A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Kurpiszia kryokonites (Cleve) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Kurpiszia semiaperta (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Kurpiszia subprotracta (Cleve) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Lunella ghalebii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Lyrella david-mannii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Lyrella fogedii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Lyrella opuntioides (Simonsen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Mastogloia urveae A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula agatkae A. Witkowski, D. Metzeltin & H. Lange-Bertalot in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula athenae A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula borowkae A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula halinae A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula hamiltonii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula hanseatica subsp. circumarctica A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula iserentantii H. Lange-Bertalot & A. Witkowsi in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula korzeniewskii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula mahoodii A. Witkowsi & Witton in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula peregrinopsis H. Lange-Bertalot & A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula rajmundii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula recurva (Meister) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula salinarum var. rostrata (Hustedt) H. Lange-Bertalot in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula stachurae A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula streckerae H. Lange-Bertalot & A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula vandamii var. mertensiae H. Lange-Bertalot in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Navicula wunsamiae A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Nitzschia plioveterana H. Lange-Bertalot in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Oestrupia ergadensis (Gregory) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Opephora minuta (Cleve-Euler) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Parlibellus adnatus (Heiden in Heiden & Kolbe) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Parlibellus bennikei A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Parlibellus crucicula (W. Smith) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Parlibellus cruciculoides (Brockmann) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Parlibellus hendeyi A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Parlibellus perytii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Parlibellus phoebeae A. Witkowski, D. Metzeltin & H. Lange-Bertalot in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Parlibellus protracta (Grunow) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Parlibellus protractoides (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Parlibellus rhombicula (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Petroneis glacialis (Cleve) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Petroneis xi (Cleve) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Pinnuavis aleemii (Hustedt in Hustedt & Aleem) A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Pinnuavis armoricana (Amossé) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Pinnuavis endophytica (Hasle) A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Plagiogrammopsis crawfordii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Planothidium campechianum (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Planothidium deperditum (Giffen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Planothidium diplopunctatum (Simonsen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Planothidium dispar (Cleve) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Planothidium heidenii (Schulz) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Planothidium jan-marcinii (A. Witkowski, D. Metzeltin & H. Lange-Bertalot in D. Metzeltin & A. Witkowski) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Planothidium lilljeborgei (Grunow) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Planothidium oculatum (Hustedt) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Planothidium polaris (Østrup) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Planothidium quarnerensis (Grunow) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Pravifusus hyalinus A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Proschkinia bulnheimii var. belgica (Grunow) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Seminavis barbara A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Staurophora anuschkae A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Staurosira punctiformis A. Witkowski, D. Metzeltin & H. Lange-Bertalot in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Stenoneis wojtek-kowalskii A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Synedra lata (Giffen) A. Witkowski in A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Vikingea gibbocalyx (Brun) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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| Vikingea promunturi (Giffen) A. Witkowski, H. Lange-Bertalot & D. Metzeltin 2000 |
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