Unidentified sp.
 
Genus: 
 
Species: 
 | 
Unidentified euglenid, 
similar to Anisonema but trailing flagellum changed to rigid rod-like structure, 
cell body  μm long,  μm wide, 
this cell always swam posteriorly (moved at the opposite direction to the flagellar base), 
x 640, Sayama Natural Park, Higashi-Murayama city, Tokyo, Japan, December 2001 by Y. Tsukii
 50 μm
 100 μm
 150 μm; x 400 : 
 31 μm
 63 μm
 94 μm; x 640
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