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Tetmemorus brebissonii </em>var.<em> minor Desmid Species Outer Hebrides

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Phylum: Charophyta   Family: Desmidiaceae

Tetmemorus brebissonii var. minor A. de Bary 1858

First described and illustrated by De Bary (1858: 73, pl. 5: 9). Heinrich Anton de Bary (1831-1888) was a German surgeon, botanist, microbiologist, and mycologist. This variety, apart from its smaller size, occupies a more acidic, oligo-mesotrophic, habitat, including with Sphagnum.
Cell dimensions: L: 61-100 µm; B: 16-22 µm; Is: 13-15 µm; L/B: 3.5-4.8.
West & West (1904: 218, pl. 32: 4-5) note "This variety is strikingly abundant in the west and north-west of Scotland." Recent sampling suggests this is no longer the case. John & Williamson (2009: 164) note "… rather rare in western Ireland."

References: 
Coesel, P.F.M. & Meesters, K.J. (2023 second edition) Desmids of the Lowlands.
De Bary, A. (1858) Untersuchungen über die Familie der Conjugaten (Zygnemeen und Desmidieen) Ein Beitrag zur physiologischen und beschreibenden Botanik.
John, D.M. & Williamson, D.B. (2009) A Practical Guide to the Desmids of the West of Ireland.
West, W. & West, G.S. (1904) A Monograph of the British Desmidiaceae, Volume 1.

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