Nitzschia sigmaformis
Hustedt
Genus:
Species:
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Nitzschia sigmaformis Hustedt ?,
cell body 92 μm long, 6 μm wide,
x 640, rice field, Izumi 741, Namegawa town, Saitama Pref., Japan, April 18, 2004 by Y. Tsukii
31 μm
63 μm
94 μm; x 640
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