Genus: Cell body ovoid or cylindrical; oral ridge turns right-spirally down to posterior end (Kudo, 1966).
Oral region spirals around body from anterior to posterior end (Illustrated Guide, 1985).
Species: Cell body ovoid, 30-60 μm long, 20-45 μm wide when starved, well-fed cells 65-120 μm long, 50-110 μm wide; spiral ridge complete turn; cytostome in the anterior end of the ridge, with a number of delicate trichites; macronucleus ovoid to elongate; a single micronucleus; contractile vacuole terminal; fresh water (Kudo, 1966). |
31 μm
63 μm
94 μm; x 640
Images of collecting locality:
Kitamoto nature observation park, Kitamoto city, Saitama Pref., May 3, 2006 by Y. Tsukii
