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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).
Species:
Similar species --> Paranassula

Nassula sp. fed on Oscillatoria (cytoplasm filled with food vacuoles containing the bluegreen algae), cell body 144 μm long, μm wide, cyrtos 10 μm in diam., trichocysts present, cytopharyngeal basket 55 μm long, many trichocysts 5-6 μm long, Kurome River, Asaka City, Saitama Pref., Japan, September 2000, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
A cell flattened under a cover glass to visualize its cyrtos
Nassula Nassula Nassula Nassula Nassula
Nassula Nassula

Kystopus parasiticum (Podophryidae, Exogenida, Suctoria), parasitic sphaerophyria-stage on this species, x 400, x 640, Tsukuba City, Ibaraki Pref., October 2000, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Kystopus Kystopus Kystopus Kystopus

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).

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