 
 Nitzschia sigmoidea
Nitzschia sigmoidea
(Nitzsch) W. Smith 1853
|  Genus: Species:
 | 
Nitzschia sigmoidea (Nitzsch) W. Smith, 
cell body 320 μm long, 18 μm wide, L/W=17.8, 
x 640, Minuma-hikawa Park, Saitama city (Urawa), Saitama Pref., Japan, February 5, 2006 by Y. Tsukii
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
 
 
 
Cell body about 380 μm long, 12 μm wide, L/W=31.7
 
 
 
Images of collecting locality: 
Minuma-hikawa Park, Saitama city (Urawa), Saitama Pref., Japan, February 5, 2006 by Y. Tsukii
 
 
 
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