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Chlorophyceae: Chlorococcales: Chlorococcaceae (Characiaceae)

Characium sieboldii
A. Braun 1855

Characium Genus: Unicellular; cell body ellipsoidal or spindle-shaped, attached on a substrate at one end; a single chloroplast plate-like in shape, with a pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Species: Cells 40-70 μm long, (17-)20-33 μm wide, L/W up to 3; symmetrical, pear-shaped or obovoid, with a short, thick stalk; apex obtuse or silghtly acute and thin-walled (The Freshwater Algal Flora of the British Isles 2002).
Similar genus --> > Characiopsis; Colacium; Characiochloris; Hydiranum;


Characium sieboldii A. Braun 1855 ?, cell body spindle-shaped, about 50 μm long, 16 μm wide, L/W=3.1, x 640, Tsuki river (exit of drainage ditch), upstream of Yanagimachi bridge, Aoyama/Shimozato, Ogawa town, Saitama Pref., Japan, November 25, 2007 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
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Images of collecting locality: Tsuki river (exit of drainage ditch), upstream of Yanagimachi bridge, Aoyama/Shimozato, Ogawa town, Saitama Pref., Japan, November 25, 2007 by Y. Tsukii


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