Family: Cirri in 2 marginal, 1 frontoventral files; cirral files straight;
more than 1 frontoventral file extends past middle of body (Illustrated Guide, 1985).
Genus: Cell body ovoid or elongate with numerous longitudinal ventral files (cirral rows); buccal cavity not extensive; frontal cirri clearly differentiated from others; two macronuclei (Carey, 1992).
cell body 135 μm long, 42 μm wide,
x 400, x 640, October 1999, Saitama Pref., stained by A. Kihara, photo by Y. Tsukii
50 μm 100 μm 150 μm; x 400 : 31 μm 63 μm 94 μm; x 640