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Chlorophyceae: Volvocales: Volvocaceae
Volvocida: Volvocina: Volvocidae

 Pandorina morum
(Müller) Bory, 1824

Pandorina morum Species: Cells 8-17 μm; colony 20-50 μm to 250 μm; 16 cells as a tight sphere within clear matrix (How to know the protozoa, 1979). Colony barrel-shaped, 8- or 16-celled; cells wedge-shaped; chloroplast longitudinally striated; colony 20-42 μm across, 60 μm long; cells 8-17 μm diam. (Illustrated Guide, 1985). Sexual reproduction by isogamy (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000). Sexual reproduction by iso- or anisogamy (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

Pandorina morum (Müller) Bory ??, colony 37 μm long, 32 μm wide, L/W=, cell body 10 μm long, 11 μm wide, L/W=, x 640, a small pond at Kowashimizu, Suwa city, Nagano Pref., Japan, May 21, 2005 by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Pandorina Pandorina
Colony 57 μm long, 52 μm wide, L/W=, cell body 18 μm long, 18 μm wide, L/W=, flagella about 25 μm long (or more), x 640
Pandorina Pandorina

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