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.,
cell body 90 μm long, 61 μm wide, L/W=,
x 400, x 640, No.2, standing water, Nakayukawa-sen (a forestry road along Omatazawa), Nishiwaga town, Iwate Pref., Japan, July 28, 2007 by Y. Tsukii
31 μm
63 μm
94 μm; x 640