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Oligohymenophorea (formerly Nassophorea): Peniculida: Parameciidae

Müller, 1773

Genus: Cigar- or foot-shaped; a single macronucleus and 1 to several vesicular or compact microuclei (Kudo, 1966). Anterior rounded or obliquely truncated, posterior rounded or tapered; cell body asymmetrical due to a depression of the ventral surface (oral groove) running from the apex of the cell to about the middle of the body; oral aperture (cytostome) at its posterior end; somatic ciliation uniform; trichocysts present; one or more contractile vacuoles present; macronucleus ovoid or reniform (Carey, 1992).
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Paramecium caudatum
P. caudatum
intact cells
206-260 μm
Paramecium caudatum
P. caudatum
Paramecium caudatum
P. caudatum
cell cortex
Paramecium caudatum
P. caudatum
cell division
Paramecium sp.
anter. truncated
2-3 C.V.
Furu-tone river
Saitama, 2004
Paramecium aurelia
P. aurelia
1 sample
119-125 μm
Paramecium multimicronucleatum
P. multi-

2 samples
250 x μm
Paramecium jenningsi
P. jenningsi
1 sample
140 x μm
Paramecium bursaria
P. bursaria
19 samples
95-150 μm
Japan, 199?-2008
Paramecium trichium
P. trichium
13 samples
77-98 x μm
Japan, 1998-2008
Paramecium polycaryum
P. polycaryum
1 sample
138-153 x μm
Paramecium duboscqui
P. duboscqui
1 sample
115 x 52 μm
125 x 50 μm
Paramecium sp.
cortical patterns
or Kawajima
Saitama, 2002
Paramecium sp.
C.V. pores
Kagawa, 2002

Paramecium sp.
Uruguay, 1999

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