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:
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Echinosphaerella sp.
cell 8-10 μm
Ushidome-ike
Norikura highland
Nagano, 2005
Echinosphaerella sp.
cell 12 μm
Ushidome-ike
Norikura highland
Nagano, 2006
Echinosphaerella sp.
cell μm
near Hachimantai Mt.
Hachimantai
Iwate, 2007
