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Nassophorea: Nassulida: Nassulina: Nassulidae

Nassula sp.
Ehrenberg, 1833

Nassula Family: Body ellipsoidal, uniformly ciliated; hypostomial frange short; prominent cytopharyngeal apparatus (Carey, 1992).
Genus: Oral aperture small, oval (Carey, 1992).
Similar species --> Paranassula

Nassula sp. (N. aurea ?), cell body 260 μm long, 200 μm wide, cyrtos 25 μm in diam., trichocysts present, rare but very long about 17 μm in length, x 200, x 400, x 640, Horai, Sashi-ohgi, Saitama city, Saitama Pref., Japan, October, 2002, by Y. Tsukii
scale 100 μm scale 200 μm scale 300 μm; x 200
Nassula Nassula Nassula Nassula
Nassula Nassula Nassula Nassula

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 aurea Ehrenberg, 1833: 250 μm long; L/W=2 (Kahl, 1931). Ovoid or elliptical, 250 μm long; reduced frange presents; long cytopharyngeal apparatus "cyrtos" presents; macronucleus with 2 to 4 micronuclei; a single contractile vacuole; trichocysts absent (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).

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