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Staurastrum chavesii </em>var.<em> latiusculum Desmid Species Outer Hebrides

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Phylum: Charophyta   Family: Desmidiaceae

Staurastrum chavesii var. latiusculum (W & G.S. West) P.F.M. Coesel & K.J. Meesters 2013

First described and illustrated by West & West (1902: 53, pl. 1: 20) as Staurastrum latiusculum. It was later moved by Coesel & Meesters (2013: 82, pl. 114: 5-6) as a variety of S. chavesii. The only difference is a spine at the base of the processes.
Cell dimensions: L: 14-20 µm; B: 18-27 µm; Is: 8-9 µm.
Both the nominate and this variety are very rare, the latter only known previously from Ireland. The habitat is acidic oligotrophic moorland bogs and pools, also associated with Sphagnum.

Coesel, P.F.M. & Meesters, K.J. (2013) European Flora of the Desmid Genera Staurastrum and Staurodesmus.
West, W. & West, G.S. (1902) A contribution to the freshwater algae of the North of Ireland.