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| Amphora coffeaeformis var. africana Fritsch & Rich 1929 |
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| Gomphonema subapicatum Fritsch & Rich 1929 |
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| Gomphonema subapicatum var. curta Fritsch & Rich 1929 |
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| Navicula pseudodicephala (pseudodicephala) Fritsch & Rich 1929 |
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| Navicula pseudostauropteroides Fritsch & Rich 1929 |
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| Navicula viridula f. minor Fritsch & Rich 1929 |
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| Navicula viridula var. minor Fritsch & Rich 1929 |
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| Navicula vulpina var. rostrata Fritsch & Rich 1929 |
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| Navicula wilmanni (wilmannii) Fritsch & Rich 1929 |
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| Nitzschia capitata Fritsch & Rich 1929 |
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| Nitzschia microcephala var. medioconstricta (medio-constricta) Fritsch & Rich 1929 |
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| Synedra biceps var. distenta Fritsch & Rich 1929 |
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| Synedra ulna var. subaequalis Fritsch & Rich 1929 |
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