Genus: Cigar- or foot-shaped; a single macronucleus and 1 to several vesicular or compact microuclei (Kudo, 1966). Species: 100-150 μm long, 50-60 μm wide; foot-shaped; green with symbiontic Chlorella; a compact micronucleus; a macronucleus; two contractile vacuoles (Kudo, 1966). Ovoid, anterior transversely truncated, posterior rounded; 80-150 μm long; oral groove wide; cytoplasm filled with green zoochlorellae; two contractile vacuoles; a single ovoid macronucleus and a micronucleus; caudal cilia present (Carey, 1992).

Other endosymbiosis -->> Acanthocystis; Mayorella; Paulinella; Paulinella; Paulinella; Climacostomum; Vorticella; Prorodon; Frontonia; Colpoda; etc.

31 μm 63 μm 94 μm; x 640

Images of collecting locality: a small pond at Omachi natural park, Ichikawa city, Chiba Pref., Japan, December 16, 2006 by Y. Tsukii