 
 Navicula sp.
Navicula sp.
|  Genus: Species:
 | 
Navicula sp.,  
cell body 30 μm long, 4.5 μm wide, 
x 640, Hirose athletic park, Kumagaya city, Saitama Pref., Japan, February 29, 2004 by Y. Tsukii
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
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