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Closterium parvulum Desmid Species Outer Hebrides

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Phylum: Charophyta   Family: Closteriaceae

Closterium parvulum C. Nägeli 1849

First described and illustrated by Nägeli (1849: 106, pl. 6c: 2). West & West (1904: 134) note: “Nägeli described the cell-wall as being very finely striated, but as we invariably find it perfectly smooth and colourless, we are inclined to believe that he included more than one species in his observations.”
Cell dimensions: L: 90-130 µm; B: 10-15 µm; Ap: 2.0-3.5 µm; Arc: 102-158; L/B: 6-15.
Common in mildly acidic to slightly alkaline habitats such as moorland bogs and pools.

References: 
Brook, A.J. & Williamson, D.B. (2010) A Monograph on some British Desmids.
Coesel, P.F.M. & Meesters, K.J. (2023 second edition) Desmids of the Lowlands.
Nägeli, C. (1849) Gattungen einzelliger Algen, physiologisch und systematisch bearbeitet.
West, W. & West, G.S. (1904) A Monograph of the British Desmidiaceae, Volume 1.

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