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).
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Bursellopsis sp.
75 x 67 μm
Japan, 1998
Bursellopsis ??
180 x 133 μm
Senuki
Nasu
Tochigi, 2004
