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| Geissleria kriegeri (Krasske) Lange-Bertalot in Metzeltin & Lange-Bertalot 1998 |
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| Geissleria mirabilis (Krasske) Metzeltin et Lange-Bertalot 1998 |
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| Geissleria neotropica Metzeltin et Lange-Bertalot 1998 |
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| Geissleria perelegans (Hustedt) Metzeltin et Lange-Bertalot 1998 |
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| Gomphonema aequirostrum Metzeltin et Lange-Bertalot 1998 |
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| Gomphonema archaevibrio Metzeltin et Lange-Bertalot 1998 |
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| Gomphonema archaevibrio f. cuneatum D. Metzeltin & H. Lange-Bertalot 1998 |
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| Gomphonema camburnii Metzeltin et Lange-Bertalot 1998 |
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| Gomphonema costei Metzeltin et Lange-Bertalot 1998 |
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| Gomphonema ellipsis Metzeltin et Lange-Bertalot 1998 |
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| Gomphonema equadorianum Metzeltin et Lange-Bertalot 1998 |
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| Gomphonema kobayashiae Metzeltin et Lange-Bertalot 1998 |
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| Gomphonema neoapiculatum Lange-Bertalot, Reichardt et Metzeltin in Metzeltin & Lange-Bertalot 1998 |
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| Gomphonema neonasutum H. Lange-Bertalot & E. Reichardt apud D. Metzeltin & H. Lange-Bertalot 1998 |
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| Gomphonema neonasutum Lange-Bertalot et Reichardt in Metzeltin & Lange-Bertalot 1998 |
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| Gomphonema potaroense Metzeltin et Lange-Bertalot 1998 |
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| Gomphonema rhombiciforme Metzeltin et Lange-Bertalot 1998 |
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| Gomphonema riotecense Lange-Bertalot, Reichardt et Metzeltin in Metzeltin & Lange-Bertalot 1998 |
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| Gomphonema salae Lange-Bertalot et Reichardt in Metzeltin & Lange-Bertalot 1998 |
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| Gomphonema spectabilissimum Metzeltin et Lange-Bertalot 1998 |
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