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| Didymosphenia curvirostrum (Tempère & Brun in Brun & Tempère) M. Schmidt 1899 |
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| Didymosphenia geminata (Lyngbye) M. Schmidt in Schmidt et al. 1899 |
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| Didymosphenia geminata var. stricta M. Schmidt in Schmidt et al. 1899 |
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| Didymosphenia sibirica (Grunow) M. Schmidt in Schmidt et al. 1899 |
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| Gomphoneis cantalica (Brun & Héribaud in Héribaud) Schmidt in Schmidt et al. 1899 |
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| Gomphoneis herculeana var. septiceps M. Schmidt in Schmidt et al. 1899 |
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| Gomphonema eriense var. rostrata M. Schmidt in Schmidt et al. 1899 |
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| Gomphonema grovei M. Schmidt in Schmidt et al. 1899 |
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| Gomphonema kamtschaticum var. dimidiata M. Schmidt in Schmidt et al. 1899 |
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| Gomphonema occidentale M. Schmidt in Schmidt et al. 1899 |
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| Gomphonema occidentale var. abbreviata M. Schmidt in Schmidt et al. 1899 |
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| Gomphonema reichelti M. Schmidt in Schmidt et al. 1899 |
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| Gomphonema scapha M. Schmidt in Schmidt et al. 1899 |
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| Gomphonema siberica (Grunow) M. Schmidt in Schmidt et al. 1899 |
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| Gomphonema tropicale Brun ex M. Schmidt et al. 1899 |
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| Gomphopleura nobilis Reichelt in A. Schmidt 1899 |
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| Rhoicosphenia adolfi M. Schmidt in Schmidt et al. 1899 |
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| Rhoicosphenia curvata var. gracilis M. Schmidt in Schmidt et al. 1899 |
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| Rhoicosphenia curvata f. minor M. Schmidt in Schmidt et al. 1899 |
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| Rhoicosphenia curvata var. subacuta M. Schmidt in Schmidt et al. 1899 |
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