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Micrasterias denticulata Desmid Species Outer Hebrides

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Phylum: Charophyta   Family: Desmidiaceae

Micrasterias denticulata  J. Ralfs 1848

First described and illustrated by Ralfs (1848: 70, pl. 7: 1). West & West (1905: 105, pl. 50: 1-2) record it as one of the commonest British species, including pure collections from boggy ditches and springs. It should be carefully compared with M. thomasiana var. notata.
Cell dimensions: L: 200-280 µm; B: 180-240 µm; Is: 23-40 µm; L/B: 1.10-1.25.
Fairly common in mesotrophic waters such as peaty pools with shallow vegetation, and Sphagnum bogs.

References: 
Coesel, P.F.M. & Meesters, K.J. (2023 second edition) Desmids of the Lowlands.
Ralfs, J. (1848) The British Desmidieae.
West, W. & West, G.S. (1905) A Monograph of the British Desmidiaceae, Volume 2.

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