Family: Body ellipsoidal, uniformly ciliated; hypostomial frange short; prominent cytopharyngeal apparatus
(Carey, 1992).
Genus: Oral aperture small, oval (Carey, 1992). Species: |
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Nassula (N. ornata ?),
cell body 150 μm long, 123 μm wide, L/W= 1.2,
cyrtos μm in diam., contractile vacuole pore slit-like, many trichocysts,
x 400, x 640, Watarase-Yusuichi, Fujioka town, Tochigi Pref., May 2001 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
A slit-like opening of contractile vacuole (CV pore),
during expulsion of water within a CV, pore changed more slit-like,
cell body μm long, μm wide, L/W= , x 640
Long cytopharyngeal basket 88 μm long, x 400, x 640
Cysts, 145 μm long, 130 μm wide, x 400, x 640
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
A conjugating pair ??, x 100, x 200, x 400, x 640
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
* Nassula ornata Ehrenberg, 1833: 250 μm long, 180 μm wide (Kahl, 1931). Ovoid, 250 μm long; frange presents; a single contractile vacuole lie in the mid-body region; macronucleus with at least three micronuclei; many trichocysts present (Carey, 1992).
Nassula terminalis Ozaki & Yagiu, 1941: Ovoid, flattened and flexible; 150-210 μm long; anterior quarter narrower than the rest of the body; cytopharyngeal opening very long; macronucleus ovoid; single micronucleus; single contractile vacuole terminal; trichocysts absent (Carey, 1992).
Nassula parva Kahl, 1928: Small, ovoid with large cytopharyngeal basket; 60 μm long; a spherical macronucleus; single contractile vacuole in mid-body region; details of range and suture not given (Carey, 1992).
Nassula rubens Perty, 1852: Small, ellipsoidal; 50-70 μm long; long cytopharyngeal basket; single contractile vacuole; single macronucleus; many trichocysts (Carey, 1992).
Nassula citrea Kahl, 1931: Ovoid or ellipsoidal, anterior not expanded; 70-90 μm long; frange equipped with long membranelles; cytopharyngeal appratus unremarkable; single contractile vacuole; single ovoid macronucelus (Carey, 1992).