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Chlorophyceae: Volvocales: Volvocaceae
Volvocida: Volvocina: Volvocidae

 Eudorina sp.

Eudorina Genus: Colonies composed of 16, 32, 64 or 128 (mostly 32) cells; 2-layered gelatinous envelope; mamillations anterior or posterior; cells spherical to ovoid with 2 equal-length apical flagella; eyespot present; anisogamy (Illustrated Guide, 1985).
Species:

Eudorina cylindrica Korshikov, 1938 (or E. elegans Ehrenberg, 1832 ?), a colony of 32 cells 138 μm long, 105 μm wide, cells 11-19 μm in diam., x 400, x 640, Shiro-numa, Tatebayashi, Gumma Pref., Japan, June 2001 by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Colonies of 16 cells (frontal view)
Eudorina Eudorina
Colonies of 16 (-2 or -1) cells (side view)
Eudorina Eudorina Eudorina Eudorina Eudorina
A colony of 32 cells
Eudorina Eudorina Eudorina
Amoeboid parasites (Nuclearia ?) present within a colony of 16 cells
Eudorina Eudorina
Colonies of 32 cells (?), number of cells already decreased
Eudorina Eudorina Eudorina Eudorina
Eudorina Eudorina

Eudorina

E. cylindrica Ehrenberg: A colony composed of 32 or 64 cells in a smooth-layered gelatinous envelope 60-120 μm diam. Vegetative cells spherical, 8-10 μm diam., with 2 flagella, 1 chloroplast cup-shaped, 1 pyrenoid (Illustrations of The Japanese Fresh-water Algae, 1977).

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