Phylum: Charophyta   Family: Closteriaceae

Closterium limneticum Lemmermann 1899

A scarce species that can be mistaken for Closterium gracile but the apices lack pores (see the comparative plate below). First described by Lemmermann (1899: p. 123, pl. 2: 39-41) from plankton, in Germany.

References: 
Lemmermann, E. (1899) Das Phytoplankton sächsischer Teiche.
Brook, A.J. & Williamson, D.B. (2010) A Monograph on some British Desmids.
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands.