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Cosmarium capitulum Desmid Species Outer Hebrides

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Phylum: Charophyta   Family: Desmidiaceae

Cosmarium capitulum J. Roy & Bisset

The Wests (1908) record "The typical form of this species is not known to occur in the British Isles." Still little data to hand but thought to be rare. Found with loch-side vegetation in mildly acidic waters. A distinct shape with pronounced, rounded, lateral margins

References: 
West, W. & West, G.S. (1908) A Monograph of the British Desmidiaceae, Volume 3
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands

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