Species: Cell body (cellwall) ellipsoidal or ovoid, rarely inverted ovoid, 14-30 μm long, 10-20 μm wide; protoplast elongated ovoid, ellipsoidal, or broad spindle-shaped, tapered to anterior end, posterior end rounded or tapered or tail-like; length of flagella equal to that of cell body; chloroplast cup-shaped; a pyrenoid located at posterior half of the cell; stigma anterior; nucleus centrally located; two contractile vacoules (Süßwasserflora von Mitteleuropa 9, Chlorophyta I, 1983).

31 μm 63 μm 94 μm; x 640

Images of collecting locality: a pond at Ashikaga flower park, Tomita, Ashikaga city, Tochigi Pref., Japan, April 22, 2006 by Y. Tsukii