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: Resembles V. campanula; but anterior end somewhat narrow; usually without refractile granules in endoplasm; cell body 50-95 μm long, 35-53 μm wide; peristome 55-75 μm wide (Kudo, 1966). Cell body 70, 80 μm long (Kahl, 1930).

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V. convallaria 80 x 40 μm L/W=2.0; P/W=1.3 Shiken-zaike Kamikawa Saitama, 2004	V. convallaria 68 x 32 μm L/W=2.1; P/W=1.2 Japan, 1997	V. convallaria 66 x 31 μm L/W=2.1; P/W=1.2 Japan, 1997	V. convallaria 65 x 30 μm L/W=2.2; P/W=1.1 Saitama, 1999
V. convallaria 65 x 37 μm L/W=; P/W= Kowashimizu Suwa Nagano, 2005	V. convallaria ? 62 x 34 μm L/W=1.8; P/W=1.1 Saitama, 2000	V. convallaria cell division 75 x μm L/W=; P/W=1.2 Japan, 1997	V. convallaria 65 x 33 μm L/W=; P/W= Numa-no-hara m. Madarao highland Niigata, 2005
V. convallaria ? 52 x 24 μm L/W=2.2; P/W= Japan, 1998	V. convallaria ? 50 x 27 μm L/W=1.9; P/W= Shibu-ike Shiga highland Nagano, 2005	V. convallaria ? 44 x 25 μm L/W=1.8; P/W= Japan, 1998	V. convallaria ? 42 x 22 μm L/W=1.9; P/W= Onnenai Kushiro marsh Hokkaido, 2005
V. convallaria ?? 34 x 16 μm L/W=1.3; P/W= Tochigi, 2000	V. convallaria cell μm L/W=; P/W= Japan, 1998	V. convallaria cell μm L/W=; P/W= Japan, 1998	V. convallaria cell μm L/W=; P/W= Japan, 1998
V. convallaria ? cell μm L/W=; P/W= Japan, 1998	V. convallaria ?? μm L/W=; P/W= Japan, 199?	V. convallaria 55 x 28 μm L/W=2.0; P/W= Musashi-Urawa Saitama, 2002	V. convallaria ? μm L/W=; P/W= Koraku-en Okayama, 2002
V. convallaria μm L/W=; P/W= Kahan Park Kuroiso Tochigi, 2003	V. convallaria ? 52 x 22 μm L/W=2.4; P/W= peristome 34 μm Benten-ike Higashi-Murayama Tokyo, 2004	V. convallaria ? 67 x 36 μm L/W=1.9; P/W= peristome 35 μm Omoi river Oyama Tochigi, 2004	V. convallaria ? 45 x 29 μm L/W=1.6; P/W= peristome 32 μm Higashi-sano Hakuba Nagano, 2004
V. convallaria 50 x 30 μm L/W=; P/W= Iyari marsh Omachi Nagano, 2005

Similar Genus ->> Carchesium
Similar Species (cell length μm) -> V. similis (60, 70); V. limnetis (60); V. smaragdina (65); V. floridensis (85);

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