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Nitzschia sigma var. rigidula (Peragallo & Peragallo) Grunow in Van Heurck 1881, (p. 179); pl. 66, fig. 8
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| Basionym | Nitzschia rigida var. rigidula Peragallo & Peragallo 1900 |
| Status | valid | |
| Published in | Van Heurck, H. 1881 [ref. 001035]. Synopsis des Diatomées de Belgique. Atlas. Ducaju & Cie., Anvers. pls 31-77. |
| Type | | INA card not found. Click here to check this name in the INA website. |
| Collector | | Assessment of record accuracy | likely accurate |
| List of nomenclatural synonyms | Nitzschia rigida var. rigidula Peragallo & Peragallo 1900
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