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| Odontidium harrisonii f. minus (minor) (Rabenhorst) De Toni 1892 |
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| Odontidium mutabile var. diatomaceum (Grunow) De Toni 1892 |
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| Plagiodiscus nervatus var. bacillaris De Toni 1892 |
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| Plagiogramma nankoorense (nancoorense) subsp. triconstrictum (Cleve & Grove) De Toni 1892 |
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| Plagiogramma staurophorum var. robustum (Brun in Brun & Tempère) De Toni 1892 |
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| Pseudo-eunotia alpina (Naegeli in Kützing) De Toni 1892 |
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| Pseudo-eunotia arcuata (Naegeli in Kützing) De Toni 1892 |
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| Pseudo-eunotia biceps (Ehrenberg) De Toni 1892 |
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| Pseudo-eunotia bicurvata (Biene in Rabenhorst) De Toni 1892 |
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| Pseudo-eunotia depressa (Schumann) De Toni 1892 |
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| Pseudo-eunotia flexuosa (Brébisson in Kützing) De Toni 1892 |
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| Pseudo-eunotia flexuosa var. bicapitata (Grunow in Van Heurck) De Toni 1892 |
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| Pseudo-eunotia lunaris (Ehrenberg; Ehrenberg) De Toni 1892 |
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| Pseudo-eunotia lunaris var. bilunaris (Ehrenberg; Ehrenberg) De Toni 1892 |
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| Pseudo-eunotia lunaris var. cuspidata (Schumann) De Toni 1892 |
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| Pseudo-eunotia lunaris var. falcata (Brébisson in Kützing) De Toni 1892 |
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| Pseudo-eunotia lunaris var. minor (Schumann) De Toni 1892 |
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| Pseudo-eunotia pachycephala (Kützing) De Toni 1892 |
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| Pseudo-eunotia schumannii (Rabenhorst) De Toni 1892 |
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| Pseudo-eunotia subarcuata (Naegeli in Kützing) De Toni 1892 |
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