Species: Cell body broad ellipsoidal or nearly spherical, 18-35 μm in diam.;
papilla broad with flattened apex; chloroplast cup-shaped; a pyrenoid horseshoe-shaped, located
beneath equatorial line or slightly posterior; stigma longitudinally elongated, thin,
located at equator or slightly anterior; nucleus at anterior half of the cell body. |
[ var. globulifera (Korschikoff) Korschikoff 1938]: Papilla narrower and more protruded; cellwall thick; with several pyrenoids irregular in shape.
[ var. perforata Vlk 1940]: Pyrenoid ring-form.
[ var. longirubra Ettl 1976]: Stigma large, elongated, stick-like in shape, longitudinally located at anterior half of the cell; papilla more broad and short; a pyrenoid elongated, curved as half-ring
(Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).
An algal parasite, Rhyzophydium sp. (Chytridiales, Chytridiomycota, Eumycota) attached Chlamydomonas monadina,
C. monadina cell body 17 μm long, 16 μm wide,
Rhyzophydium cell body spherical 2 μm in diam.,
x 640, Akigase Park, Saitama city, Saitama Pref., Japan, March 2002 by Y. Tsukii
31 μm 63 μm 94 μm; x 640