- Pleurosigma quadratum W. Smith
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Syn. Brit. Diat. 1: 65, pl. XX: fig. 204.
1853.
(E)
Type locality: England (various localities); Wales (Menai Straits)
See Gyrosigma quadratum (W. Smith) Griffith & Henfrey 1956
Retrieve all Pleurosigma
Get original family assignment from Index Nominum Genericorum
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