Family: Solitary, gregarious, or colonial; most are aloricate, some form lorica; each zooid has its own, independently contractile myoneme in full length of stalk.
Genus: Solitary, but often gregarious; myoneme continuous within full length of stalk (Illustrated Guide, 1985).
Species: Cell body μm long (Kahl, 1930).

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V. microstoma ? 57 x 35 μm peristome 20 μm river bank Sakado Saitama, 2005	V. microstoma ? 55 x 30 μm peristome 21 μm Omoi river Oyama Tochigi, 2004	V. microstoma 51 x 35 μm peristome ? μm Ichinose-enchi Norikura highland Nagano, 2005	V. microstoma 50 x 32 μm peristome 18 μm Watarase river Ashikaga Tochigi, 2004
V. microstoma 45-57 x 33-40 μm peristome 22-25 μm near Shirakobato w.p. Iwatsuki-ku Saitama, 2006	V. microstoma 47 x 32 μm peristome 24 μm near Michi-no-Oasis Shobu Saitama, 2004
V. microstoma 42 x 25 μm peristome μm Kazo Saitama, 2003	V. microstoma 42 x 28 μm peristome 21 μm Iruma river Sayama Saitama, 2004	V. microstoma 40 x 24 μm peristome 16 μm Hiroshima, 1998	V. microstoma 40 x 25 μm peristome μm Furu-tone river Kasukabe Saitama, 2004
V. microstoma 40 x 24 μm peristome 20 μm Shimo-nanbata Fujimi Saitama, 2006	V. microstoma 35 x 21.5 μm peristome 15.5 μm Ichinokawa Yoshimi Saitama, 2006	V. microstoma 34 x 24 μm peristome 20 μm Koshigaya Saitama, 2001	V. microstoma 32 x 20 μm peristome 15 μm Shiken-zaike Kamikawa Saitama, 2004
V. microstoma or Rhabdostyla ? 31 x 23 μm peristome 17 μm Japan, 1998	V. microstoma 27 x 20 μm peristome 16 μm Uruguay, 1999

Similar Genus ->> Carchesium
Similar Species (cell length μm) -> V. ();

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