| WebNameShort | |
| Cymbella helvetica var. africana Fritsch & Rich 1924 |
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| Gomphonema crassestriatum Fritsch & Rich 1924 |
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| Navicula interrupta f. pseudomesolepta Fritsch & Rich 1924 |
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| Navicula mesolepta var. africana Fritsch & Rich 1924 |
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| Navicula mesolepta f. stauroneiformis (Otto Müller) Fritsch & Rich 1924 |
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| Nitzschia hantzschiaeformis Fritsch & Rich 1924 |
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| Nitzschia hantzschiaeformis var. constricta Fritsch & Rich 1924 |
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| Stauroneis anceps var. lata Fritsch & Rich 1924 |
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| Synedra amphirhynchus var. fragilariaeformis Fritsch & Rich 1924 |
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| Synedra fragilariaeformis Fritsch & Rich 1924 |
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