Oligohymenophorea:
Peritrichia: Sessilida: Vorticellidae
Carchesium sp.
Ehrenberg, 1830
Genus: Colonial; each zooid has a separately contractile myoneme
(Illustrated Guide, 1985).
Each animal has its own myoneme, can contract singly without causing colony to contract (How to know the
protozoa, 1979).
Species:
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Zoothamnium;
Vorticella;
Opercularia;
Epistylis;
Carchesium sp.,
each zooid has a separate myoneme, by K. Mikami
Carchesium polypinum Linnaeus, 1758:
100-125 μm long;
colony up to 3 mm; fresh water (Kudo, 1966).
120-125 μm long
(How to know the protozoa, 1979).
Body bell-shaped; 80-140 μm long;
a macronucleus C-shaped (Kojima, et al., 1995).
Carchesium granulatum Kellicott:
About 100 μm long;
two contractile vacuoles anterior (Kudo, 1966).
cf.
Zoothamnium: Like Carchesium but myonemes of individuals are connected as a single, branched
contractile system, whole colony contracts at once (How to know the protozoa, 1979).
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