Phylum: Charophyta   Family: Desmidiaceae

Cosmarium subochthodes var. majus W. Schmidle 1898

First described and illustrated by Schmidle (1898: 36, pl. 1: 51). This is one of several taxa associated with the doubtful C. subochthodes. See Kouwets (in manuscript) for a detailed review of this complex. He proposes to rename this taxon as C. arvidsjaurense. Schmidle’s drawing shows an incredible 38 granules per semicell in face-view (surely a bit excessiveµm).
Cell dimensions: L: (95-)109-130 µm; B: (70-)77-90 µm, I: 23-30 µm; Th: (46-)50-53 µm; L/B: 1.36-1.49.
Status unknown due to taxonomic confusion. Typical habitat would be acidic moorland pools and bogs.

References: 
Kouwets, F.A.C. (in manuscript) European Flora of the Desmid Genus Cosmarium.
Schmidle, W. (1898) Über einige von Knut Bohlin in Pite Lappmark und Vesterbotten gesammelte Süsswasseralgen.