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Nassophorea: Synhymeniida: Scaphidiodontidae

Chilodontopsis sp.
(Blockmann, 1895) Deroux, 1978

Chilodontopsis Genus: Both body surfaces ciliated (Illustrated Guide, 1985). Body ovoid or anterior projected toward left; flattened on both sides; both surface ciliated; cyrtos straight; a large macronucleus (Carey, 1992).
Similar species ->> Chilodonella; Trithigmostoma; Nassula

Chilodontopsis sp. (hisionensis or vorax ?; or Synhymenia Synhymeniidae ?), cell body 175 μm long, anterior projected toward left, flattened on both sides, cyrtos straight, consists of 16 rods ?, postoral ciliary row present, ovoid macronucleus (spherical not ellipsoidal), contractile vacuole(s) posterior, x 400, Japan, November 1998, by Y. Tsukii
scale 31 μm scale 63 μm scale 94 μm; x 640
Chilodontopsis Chilodontopsis

* Chilodontopsis hisionensis Ozaki & Yagiu, 1941: Body long ellipsoid, dorsoventrally flattened, anterior rounded, posterior slightly pointed; anterior projected toward left; 150-200 μm long, 45-60 μm wide; cytostome located at antero-ventral side; cyrtos consists of 16 rods; a single macronucleus ellipsoid, with a micronucleus; 5-6 contractile vacuoles in posterior half of the body (Kojima, et al., 1995).

Chilodontopsis vorax (Stokes, 1886) Kahl, 1931: Elongate, 120-160 μm long; anterior curved to left, posterior rounded; long cytopharyngeal basket (Carey, 1992).

Chilodontopsis simplex Ozaki & Yagiu, 1941: Elongate, 110 μm long; a large cytopharyngeal basket of the "cyrtos" type; slightly expanded anterior, posterior rounded; macronucleus large & ovoid; single contractile vacuole (Carey, 1992).

Chilodontopsis numerosa Ozaki & Yagiu, 1941: Elongate, anterior expaneded & posterior rounded; 200-250 μm long; single macronucleus ovoid or reniform; numerous large contractile vacuoles (Carey, 1992).

Chilodontopsis oblonga (Maupas, 1883) Kahl, 1931: Elongate, 100-120 μm long; posterior tapers, but anterior not expanded; cytopharyngeal apparatus typical of the genus; a large and ovoid macronucleus; single contractile vacuole terminal (Carey, 1992).

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