Family: Stalkless; cell body drawn out; in some species it appear stalklike at rear; peristomal disc not stalked (Illustrated Guide, 1985).
Genus: No trochal band when mature; macronucleus long, often C-shaped (Illustrated Guide, 1985).

->> Description at WPRNO

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S. constricta ? or Paravorticella ? 86 x 16 μm Yaku Island Kagoshima, 2001	S. constricta 47-62 x 16-20 μm Koshigaya Saitama, 2001	S. constricta 51 x 19 μm Saitama, 1999	S. constricta 65 x 21 μm Demaru-nakago Kawajima Saitama, 2005
S. constricta 47 x 20 μm Kayoicho-ike Fukuoka, 2001	S. constricta ? 50-55 x 18-21 μm Higashi-Matsuyama Saitama, 2002	S. constricta ? 50 x 20 μm Tsukuba Ibaraki, 2002
S. constricta ? 72 x 36 μm Ushidome-ike Norikura highland Nagano, 2005	S. constricta ? μm Ushidome-ike Norikura highland Nagano, 2007	S. constricta ? 70 x 30 μm Ukishima marsh Tsugaike highland Nagano, 2005	S. constricta ? 55 x 37 μm Shimo-Kenashitai Hakkoda mountain Aomori, 2006
S. constricta ? 65 x 26 μm Kitamoto nature o.p. Kitamoto Saitama, 2005	Scyphidia sp. or Rhabdostyla ? μm Kanazawa Ishikawa, 2003

Similar genus -- > > Paravorticella;

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