Family: Synhymenium sparsely ciliated, extends from postoral region onto left preoral body surface; somewhat dorsoventrally flattened; thigmotactic (Illustrated Guide, 1985).
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).

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C. hisionensis ? or vorax ? 175 μm Japan, 1998	C. hisionensis ? or vorax ? 195 x 78 μm Saitama, 1999	Chilodontopsis sp. ? μm Senjo-ga-hara Nikko Tochigi, 2003	Chilodontopsis sp. ? 110 x 40 μm Koaze river Saitama, 2002
C. depressa 80 x 40 μm Japan, 1998 Movies	C. depressa 76 x 30 μm Saitama, 1999	Chilodontopsis sp.1' depressa ? 84 x 30 μm Saitama, 1999	Chilodontopsis sp.1' depressa ? 50 x 21 μm Japan, 1998
Chilodontopsis sp.1' depressa ? 40 x 18 μm Okubo Ryoke Akigase park Saitama, 2005	Chilodontopsis sp.2 or Zosterodasys ? 80 x 50 μm Saitama, 1999

Similar species ->> Chilodonella; Trithigmostoma; Nassula

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