Chlorophyceae: 
Chlorococcales: Palmellaceae
Sphaerocystis schroeteri
Chodat
 
Genus: Colonies small, spherical or aggregates in shape; sheath inconspicuous or absent; cell body spherical in shape; 
chloroplasts cup-shaped or plate-like (Illustrations of the Japanese fresh-water algae, 1977). 
 
Species: 
 
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Sphaerocystis schroeteri Chodat ?, 
cell body  μm long,  μm wide, 
x 640, Omine-numa (pond/marsh), Tsukiyono town, Gunma Pref., Japan, September 2003 by Y. Tsukii
 50 μm
 100 μm
 150 μm; x 400 : 
 31 μm
 63 μm
 94 μm; x 640
Sphaerocystis schroeteri Chodat: 
Colonies sherical in shape, consisting of 4-16 cells, 30-80 μm in diam.; 
cell body spherical, 5-12 μm in diam.; a single chloroplast cup-shaped with a 
pyrenoid (Illustrations of the Japanese fresh-water algae, 1977).  
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