Unidentified
 
Genus: 
 
Species: 
 | 
Synedra ?, 
cell body 95 μm long, 4.5 μm wide, 
x 640, Watarase river, Ashikaga city, Tochigi Pref., Japan, February 1, 2004 by Y. Tsukii
 31 μm
 63 μm
 94 μm; x 640
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