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. (P. agilis ?),
cell body 30 μm long, 18 μm wide, L/W=1.7,
x 640, rice field, near Ichinoseki Railroad Station, Ichinoseki city, Iwate Pref., Japan, July 24, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640