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: Usually in groups; endoplasm filled with refractile reserve granules; vestibule very large with an outer pharyngeal membrane; cell body 50-157 μm long, 35-99 μm wide, peristome 60-125 μm wide (Kudo, 1966). Cell body 80 μm long (Kahl, 1930).

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V. campanula 80 x 45 μm peristome 75 μm Saitama, 1999	V. campanula 75 x 49 μm peristome 69 μm Japan, 1997	V. campanula 69 x 63 μm peristome 91 μm Japan, 1997	V. campanula 78 x 50 μm peristome 81 μm Japan, 1997
V. campanula 63 x 40 μm peristome 60 μm Tochigi, 2001	V. campanula μm peristome μm Japan, 199?	V. campanula 56 x 30 μm peristome 48 μm Japan, 1998	V. campanula cell μm Japan, 1998
V. campanula or V. patellina ? 78 x 72 μm peristome 112 μm Kiyose Tokyo, 2001	V. campanula ? 75 x 51 μm peristome 78 μm Ichikawa Chiba, 2001	V. campanula 67 x 35 μm peristome 50 μm Iruma river Sayama Saitama, 2004	V. campanula 50 x 38 μm peristome 50 μm Onnenai Kushiro marsh Hokkaido, 2005
V. campanula 67 x 35 μm peristome 52 μm Ajisai Park Kodaira Tokyo, 2006	V. campanula ? or similar sp. ? 52 x 42 μm peristome 52 μm Kenashitai Hakkoda mountain Aomori, 2005
V. campanula ectosymbiont ? μm peristome μm Japan, 1998	V. campanula μm peristome μm Japan, 1997	V. campanula μm peristome μm Japan, 1997	V. campanula Azure C staining μm peristome μm Japan, 1997

Similar Genus ->> Carchesium
Similar Species (cell length μm) -> V. d'udekemi (130); V. patellina (90); V. citrina (80); V. marginata (80); V. fornicata (42);

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