Phylum: Charophyta   Family: Desmidiaceae

Staurodesmus connatus (P.M. Lundell) K. Thomasson 1960

First described and illustrated by Lundell (1871: 60, pl. 3: 28) as a variety of Staurastrum dejectum. Much later it was moved to the genus Staurodesmus by Tomasson (1960: 34, pl. 11: 16).
Cell dimensions: L: 22-24 µm; B: 21-24 µm.; Is: 6-8 µm; Sp: 7-9; Overall: L: 34-45 x B: 25-35.
An acidophile of moorland pools and bogs. Probably widespread in such habitats but not common.

References: 
Coesel, P.F.M. & Meesters, K.J. (2013). European Flora of the Desmid Genera Staurastrum and Staurodesmus.
Lundell, P.M. (1871). De Desmidiaceis, quae in Suecia inventae sunt, observationes criticae.
Thomasson, K. (1960). Notes on the plankton of Lake Bangweulu Part 2.