Family: Body large, contractile; right oral cilia prominent; left oral polykinetids delimit unciliated peristomal field (Illustrated Guide, 1985).
Genus: Body ellipsoid; anterior end truncate; posterior end rounded; peristome wide and V-shaped; a large membrane on right edge and adoral zone on left; macronucleus moniliform (Kudo, 1966).

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C. vastum ? 120 x 72 μm Saitama, 1999	C. vorticella 127 x 65 μm Japan, 1997	Condylostoma sp. 123 x 98 μm Tatebayashi Gunma, 2001	C. psammophilum ? 100 x 35 μm Japan, 1998
Condylostoma ? or Paracondylostoma ? 67 x 30 μm Ikenokochi m.4 Tsuruga Fukui, 2006	Condylostoma ? or Paracondylostoma ? 85 x 35 μm Yukawa-numa Nishiwaga Iwate, 2007	Condylostoma ? 45 x 22 μm Ikenokochi marsh Tsuruga Fukui, 2004	Condylostoma ? μm Kareki-numa m. Nikko Tochigi, 2008
Condylostoma ? or Paracondylostoma ? μm Kannon-numa f.p. Shimogo Fukushima, 2008

Similar genus -->> Paracondylostoma;

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