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| Cymatopleura solea f. minor Otto Muller in Schmidt et al. 1904 |
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| Epithemia argus var. angusta Fricke in Schmidt et al. 1904 |
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| Epithemia argus var. capitata Fricke in Schmidt et al. 1904 |
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| Epithemia argus var. ocellata (Ehrenberg) Fricke in Schmidt et al. 1904 |
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| Epithemia argus var. testudo Fricke in Schmidt et al. 1904 |
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| Epithemia intermedia Fricke in Schmidt 1904 |
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| Epithemia muelleri Fritsch in Schmidt et al. 1904 |
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| Epithemia reichelti Fricke in Schmidt et al. 1904 |
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| Epithemia turgida var. capitata Fricke in Schmidt et al. 1904 |
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| Gomphonema constrictum f. (Ehrenberg) Fricke in A. Schmidt 1904 |
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| Gomphonema constrictum var. cuneata Fricke in Schmidt et al. 1904 |
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| Gomphonema constrictum f. parva Grunow ex Fricke in Schmidt et al. 1904 |
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| Gomphonema fusus Fricke in Schmidt et al. 1904 |
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| Gomphonema heideni Fricke in Schmidt et al. 1904 |
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| Gomphonema heideni var. sparsistriata Fricke in Schmidt et al. 1904 |
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| Gomphonema lepidum Fricke in Schmidt et al. 1904 |
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| Gomphonema manubrium Fricke in Schmidt et al. 1904 |
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| Gomphonema rhombicum Fricke in Schmidt et al. 1904 |
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| Gomphonema rhombicum var. minor Fricke in Schmidt et al. 1904 |
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| Gomphonema subclavatum f. minor Brun ex Fricke in Schmidt et al. 1904 |
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