Unidentified sp.
 
Genus: 
 
Species: 
 | 
xxxx, 
cell body  μm long,  μm wide, 
x 640, Otto-Numa (pond), Tsuchiura city, Ibaraki Pref., Japan, July 2002 by Y. Tsukii
 50 μm
 100 μm
 150 μm; x 400 : 
 31 μm
 63 μm
 94 μm; x 640
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