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Gyrosigma formosum (W. Smith) Griffith & Henfrey 1856, p. 302; pl. 11, fig. 25
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| Basionym | Pleurosigma formosum W. Smith 1852 |
| Published in | Griffith, J.W. and Henfrey, A. 1856 [ref. 001935]. Diatomaceae. In: The Micrographic Dictionary [1st edition]. John Van Boorst, Paternoster Row, London. |
| 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 | Pleurosigma formosum W. Smith 1852
Scalprum (Scalptrum) formosum (W. Smith) Kuntze 1891
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