| WebNameShort | |
| Achnanthes hauckiana f. fossilis Manguin 1952 |
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| Achnanthes modesta Manguin 1952 |
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| Achnanthes ocellata Manguin 1952 |
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| Achnanthes ranomafanensis Manguin 1952 |
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| Achnanthes similivalvata Manguin 1952 |
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| Amphora ranomafanensis Manguin 1952 |
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| Caloneis trigonocephala E. Manguin 1952 |
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| Caloneis ventricosa var. cuneata E. Manguin 1952 |
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| Cocconeis placentula var. ranomafanensis E. Manguin 1952 |
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| Cymbella lata f. tumidoventralis E. Manguin 1952 |
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| Eunotia pectinalis f. triodon Manguin 1952 |
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| Eunotia veneris var. rhynchocephala Manguin 1952 |
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| Eunotia veneris var. subparallela Manguin 1952 |
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| Fragilaria brevistriata f. intermedia Manguin 1952 |
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| Fragilaria construens f. alpha Manguin 1952 |
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| Fragilaria construens f. beta Manguin 1952 |
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| Fragilaria lenoblei Manguin 1952 |
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| Fragilaria lenoblei f. lanceolata Manguin 1952 |
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| Fragilaria lenoblei f. trigona Manguin 1952 |
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| Gomphonema augur f. fossilis Manguin 1952 |
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