Family: Colonies consisting of a fixed number of cells (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Flattened colonies of 4 cells embedded in gelatinous sheaths; cells nearly sphearical, with two flagella of equal length, a stigma and two contractile vacuoles; a single chloroplast cup-shaped, with a single or several pyrenoids; asexual reproduction by autocolony formation, each cell divides into a daughter colony; sexual reproduction isogamous (Photomicrographs of the Freshwater Algae, vol. 2, 1984).
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T. socialis
cell μm
Kenmin-kenko f.m.p.
Koshigaya
Saitama, 2006
T. socialis
colony of 4 cells
cell μm
Benten-ike
Higashi-Murayama
Tokyo, 2004
T. socialis
colony of 4 cells
cell μm
Tachikawa
Tokyo, 2004
T. socialis
colony of 4 cells
cell μm
Senganpi Suigo p.
Saitama
Saitama, 2005
T. socialis
cell μm
Old Sugata river
Mibu
Tochigi, 2008
T. socialis
cell μm
Kashiwa-no-ha
Kashiwa
Chiba, 2008
