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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 , each mother cell containing two or more (8 ?) daughter cells, mother cell body 54 μm long, 16 μm wide, x 400, x 640, Shimo-kawahara Park (near Iruma river), Sayama city, Saitama Pref., Japan, March 7, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Characium Characium Characium Characium

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