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Staurastrum cingulum </em>var.<em> obesum Desmid Species Outer Hebrides

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Phylum: Charophyta   Family: Desmidiaceae

Staurastrum cingulum var. obesum  G.M. Smith 1922

The first mention of cingulum is by West & West (1903: 548, pl. 18: 6-7) as a variety of Staurastrum paradoxum. Smith raised cingulum to species level and created the variety obesum (Smith 1922: 353) as a stockier cell and less elongate.
Cell dimensions: L: 39-70 µm; B: 50-68 µm; Is: 9-13 µm.
An infrequently recorded acidophile, found in moorland bogs and abandoned peat-cuttings.

References: 
Coesel, P.F.M. & Meesters, K.J. (2023 second edition). Desmids of the Lowlands.
Smith, G.M.(1922) The phytoplankton of the Muskoka region, Ontario, Canada.
West, W. & West, G.S(1903). Scottish freshwater plankton.

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