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Micrasterias crux-melitensis Desmid Species Outer Hebrides

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Phylum: Charophyta   Family: Desmidiaceae

Micrasterias crux-melitensis J. Ralfs 1848

First described and illustrated by Ralfs (1848: 73, pl. 9: 3). West & West (1905: 116, pl. 53: 1-3) note it as a rare species in Britain with no records for either the Inner or Outer Hebrides. However, Coesel & Meesters (2023: 104) note for the Netherlands: “Rather common in fen hollows and fen pits, …”
Cell dimensions: L: 100-130 µm; B: 90-125 µm; Is: 16-20 µm; L/B: 1.00-1.20.
An acidophile found in moorland peaty pools.

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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