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Trebouxiophyceae (Pleurastrophyceae): Pleurastrales:
(Chlorophyceae: Trentepohliales: Trentepohliaceae)

 Leptosira sp.

Leptosira Genus: Subaerial algae, irregularly branched; cell division by septum formation; asexual reproduction by zoospore; cell body contains a large vacuole (Illustrations of The Japanese Fresh-water Algae, 1977).
Species:

Leptosira sp. ?, cell body μm long, μm wide, x 640, Numappara marsh, Nasu-shiobara city (formerly Kuroiso city), Tochigi Pref., Japan, August 2003 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Leptosira Leptosira

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