Species:
Test rounded in frontal view, elliptical in side view (dorsoventrally compressed spheres), thick, transparent or brownish in color, covered
by many small rods-like structures arranging along longitudinal axis of test; protoplast ovoid;
lengh of flagella nearly the same as that of test;
chloroplast cup-shaped; a pyrenoid located posteriorly; stigma elongated, stick-like in shape, at anterior;
nucleus centrally located; two contractile vacuoles apical
(An illustrated guide to freshwater zooplankton in Japan, 2000).
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31 μm
