Genus: Oral aperture small, oval (Carey, 1992).
With more than 10 body kineties and cross-striations between adjacent kineties (Illustrated Guide, 1985).
Species:
Pseudomicrothorax sp. (or Microthorax ?),
cell body 43 μm long, 25 μm wide,
x 640, a pond near Asami-numa (Azami-numa), Iwajuku, Kasakake town, Gunma Pref., Japan, October 2001 by Y. Tsukii
31 μm
63 μm
94 μm; x 640