Phylum: Charophyta   Family: Desmidiacea

Staurastrum maamense W. Archer 1869

First described by Archer (1869: 200): a presentation and description given to the Dublin Microscopical Society Meeting. West, West & Carter (1923: 75) give few records for Britain, concentrated in the north-west.
Cell dimensions: L: 32-43 µm; B: 30-35 µm; Is: 10-12.5 µm.
Found in the benthos and plankton of slightly acidic lochs and moorland pools. A rare Atlantic-Arctic species.

References: 
Archer, W. (1869). [In] Dublin Microscopical Club [In] Proceedings of Societies.
Coesel, P.F.M. & Meesters, K.J. (2013). European Flora of the Desmid Genera Staurastrum and Staurodesmus.
West, W., West, G.S. & Carter, N. (1923). A Monograph of the British Desmidiaceae, Volume 5.