Order: No kinetidal specializations at oral region.
Family: Free swimming; most body kineties bipolar, cytostome apical.
Genus: Body kineties inflect into slight anterior depression (Illustrated Guide, 1985).
Species:
Bursellopsis sp. ??,
cell body 180 μm long, 133 μm wide,
x 400, x 640, rice field, Senuki, Takaku-kou, Nasu town, Tochigi Pref., Japan, October 31, 2004 by Y. Tsukii
50 μm
100 μm
150 μm; x 400