Family: Unicells or colonies of non-fixed number of cells; cell body variable in shape; one or more chloroplasts variable in shape; asexual reproduction by autospore or autocoenobium (Illustrations of The Japanese Fresh-water Algae, 1977).
Genus: Unicellular; planktonic; cell body nearly spherical, with 3-4 corners, from which transparent conical projections emerging; 1 or several chloroplasts plate-like, with a pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
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T. schmidlei
or T. setigerum ?
cell 9 μm
spines 27 μm
Musashi-Urawa
Saitama, 2001
T. schmidlei
or T. setigerum ?
cell μm
Kashiwa v.m.p.
Kashiwa
Chiba, 2008
T. schmidlei
or T. setigerum ?
cell μm
Kaji-ike p.
Abiko
Chiba, 2008
