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| Nitzschia hantzschiana f. subserians (Grunow in Van Heurck) Hustedt in Schmidt et al. 1924 |
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| Nitzschia sigma f. maxima (Grunow) Hustedt in Schmidt et al. 1924 |
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| Nitzschia heideni (heidenii) (Meister) Hustedt in Schmidt et al. 1924 |
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| Nitzschia hustedti Debes ex Hustedt in Schmidt et al. 1924 |
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| Cymbellonitzschia minima Hustedt in Schmidt 1924 |
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| Nitzschia abbreviata Hustedt in Schmidt et al. 1924 |
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| Nitzschia amoena Hustedt in Schmidt et al. 1924 |
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| Nitzschia angustissima Hustedt in Schmidt et al. 1924 |
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| Nitzschia fonticola var. pelagica Hustedt in Schmidt et al. 1924 |
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| Nitzschia glandiformis Hustedt in Schmidt et al. 1924 |
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| Nitzschia holsatica Hustedt in Schmidt et al. 1924 |
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| Nitzschia plana var. americana Hustedt in Schmidt et al. 1924 |
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| Nitzschia plana var. fennica Hustedt in Schmidt et al. 1924 |
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| Nitzschia subregula Hustedt in Schmidt et al. 1924 |
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