Genus: With conspicuous oral bristle; oral diameter distinctly less than aboral diameter (Illustrated Guide, 1985).
Species:
Opisthonecta henneguyi, cyst formation,
cell body μm long, μm wide,
x 400, x 640, Matsumoto, Nagano Pref., Japan, May 2001, collected by N. Kinoshita, photo by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640