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Pleurosigma angulatum var. quadratum (W. Smith) Van Heurck 1885, p. 115
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| Basionym | Pleurosigma quadratum W. Smith 1853 |
| Status | Valid | |
| Published in | Van Heurck, H. 1885 [ref. 001040]. Synopsis des Diatomées de Belgique. Texte. Martin Brouwers & Co., Anvers. 235 pp. |
| 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 | Gyrosigma quadratum (W. Smith) Griffith & Henfrey 1856
Pleurosigma quadratum W. Smith 1853
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