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| Achnanthes thienemannii Hustedt 1942 |
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| Cymbella leptoceros (leptoceras) var. rostrata Hustedt 1942 |
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| Denticula bacillum Hustedt 1942 |
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| Denticula linearis Hustedt 1942 |
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| Denticula parva Hustedt 1942 |
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| Epithemia sorex var. lapponica Hustedt 1942 |
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| Navicula abiskoensis Hustedt 1942 |
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| Navicula bryophila var. lapponica Hustedt 1942 |
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| Navicula jaernefeltii Hustedt 1942 |
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| Navicula laticeps Hustedt 1942 |
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| Navicula naumanni (naumannii) Hustedt 1942 |
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| Navicula pseudobryophila Hustedt 1942 |
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| Navicula pseudosilicula Hustedt 1942 |
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| Navicula rivularis Hustedt 1942 |
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| Navicula seminulum var. intermedia Hustedt 1942 |
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| Navicula tenuicephala Hustedt 1942 |
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| Navicula tuscula f. angulata Hustedt 1942 |
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| Neidium iridis f. rostrata Hustedt 1942 |
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| Nitzschia amphibioides Hustedt 1942 |
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| Nitzschia denticuloides Hustedt 1942 |
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| Nitzschia insecta Hustedt 1942 |
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| Nitzschia invicta f. lanceolata Hustedt 1942 |
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| Nitzschia invisitata Hustedt 1942 |
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| Nitzschia irrepta Hustedt 1942 |
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| Nitzschia irresoluta Hustedt 1942 |
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| Nitzschia luzonensis Hustedt 1942 |
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| Nitzschia philippinarum Hustedt 1942 |
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| Nitzschia pseudoamphioxys Hustedt 1942 |
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| Nitzschia subdenticula Hustedt 1942 |
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| Nitzschia subrostrata Hustedt 1942 |
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| Nitzschia towutensis Hustedt 1942 |
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| Nitzschia wolterecki Hustedt 1942 |
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| Pinnularia brandelii (brandeli) var. recta Hustedt 1942 |
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| Pinnularia brevicostata f. ventricosa Hustedt 1942 |
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| Pinnularia curtistriata Hustedt 1942 |
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| Pinnularia lapponica Hustedt 1942 |
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| Pinnularia rigens Hustedt 1942 |
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| Pinnularia stomatophora var. gibbosa Hustedt 1942 |
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| Stenopterobia pelagica Hustedt 1942 |
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| Stenopterobia robusta Hustedt 1942 |
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| Surirella halteriformis Hustedt 1942 |
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| Surirella horrida Hustedt 1942 |
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| Surirella horrida f. constricta Hustedt 1942 |
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| Surirella ovulum Hustedt 1942 |
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| Surirella papillifera Hustedt 1942 |
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| Surirella pseudovalis Hustedt 1942 |
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| Surirella rudis var. laevis (levis) Hustedt 1942 |
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| Surirella sublinearis Hustedt 1942 |
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| Surirella ventricosa Hustedt 1942 |
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| Surirella wolterecki Hustedt 1942 |
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| Surirella (Suriraya) alata Hustedt 1942 |
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| Surirella (Suriraya) angustiformis Hustedt 1942 |
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| Surirella (Suriraya) bidens Hustedt 1942 |
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| Surirella (Suriraya) biseriata var. celebesiana Hustedt 1942 |
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| Surirella (Suriraya) biseriata var. heteropolis Hustedt 1942 |
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| Surirella (Suriraya) celebesiana Hustedt 1942 |
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| Surirella (Suriraya) celebesiana var. matanensis Hustedt 1942 |
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| Surirella (Suriraya) conversa Hustedt 1942 |
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| Surirella (Suriraya) cuspidata Hustedt 1942 |
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| Surirella (Suriraya) decipiens Hustedt 1942 |
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| Surirella (Suriraya) elegantula Hustedt 1942 |
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| Surirella (Suriraya) elegantula f. cuneata Hustedt 1942 |
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| Surirella (Suriraya) excellens Hustedt 1942 |
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| Surirella (Suriraya) fimbriata Hustedt 1942 |
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| Synedra ulna sensu Hustedt 1942 |
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