Phylum: Charophyta   Family: Desmidiaceae

Cosmarium boitierense  Kouwets

Only described in 1998, the distribution is largely unknown. Current finds have been in circumneutral waters, mainly winter floor water

References: 
Kouwets, F.A.C. (in manuscript) European Flora of the Desmid Genus Cosmarium
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands