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| Achnanthes austriaca var. dracomontana Cholnoky 1957 |
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| Achnanthes rautenbachiae Cholnoky 1957 |
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| Caloneis lagerstedtii (Lagerstedt) Cholnoky 1957 |
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| Cymbella anassae Cholnoky 1957 |
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| Cymbella rautenbachiae Cholnoky 1957 |
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| Cymbella subalpina var. natalensis Cholnoky 1957 |
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| Cymbella subventricosa Cholnoky 1957 |
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| Diploneis tugelae Cholnoky 1957 |
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| Eunotia vandermerwei Cholnoky 1957 |
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| Navicula anassae Cholnoky 1957 |
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| Navicula artemidis Cholnoky 1957 |
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| Navicula bryophila var. trigibba Cholnoky 1957 |
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| Navicula bushmanorum Cholnoky 1957 |
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| Navicula cavernae Cholnoky 1957 |
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| Navicula contenta f. gigantea Cholnoky 1957 |
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| Navicula natalensis Cholnoky 1957 |
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| Navicula pupula f. minutula Cholnoky 1957 |
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| Navicula rautenbachiae Cholnoky 1957 |
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| Navicula tennelloides var. capitata Cholnoky 1957 |
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| Navicula terrestris var. vandermerwei (Cholnoky) Cholnoky 1957 |
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