Species: Colony of 32 or 16 cells (An Illustrated Guide to Freshwater Zooplankton in Japan, 2000). Colony ellipsoidal (or slightly ovoid or nearly spherical), posterior end wavy, consisting of 32 or 16 cells, 60-130 μm long, 50-106 μm wide; colony of 32 cells formed by a stacking of five chaplets; cells of anteriorly-located chaplet slightly smaller than others); cells spherical or pear-shaped, 5.5-18 μm in diam.; chloroplast cup-shaped, with a pyrenoid posteriorly; stigma large, located anteriorly; sexual reproduction by heterogamy, all cells of the colony form spermatozoon or oocytes (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

31 μm 63 μm 94 μm; x 640