Oligohymenophorea
(formerly Nassophorea): Peniculida: Parameciidae
Paramecium trichium
Stokes, 1885
Genus: Cigar- or foot-shaped; a single macronucleus and 1 to several vesicular or compact microuclei
(Kudo, 1966).
Species: Oblong; 50-105 (80-90) μm long;
a compact micronucleus; two contractile vacuoles; fresh water (Kudo, 1966).
Similar in shape to P. bursaria but much more rounded at both ends;
70-90 μm long;
two conctractile vacuoles; a single ovoid macronucleus with a single micronucleus; caudal cilia present
(Carey, 1992).
Generally believed P. trichium = P. putrinum (see below)
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Parameium trichium ???,
cell body 77 μm long, 41 μm wide,
x 400, x 640, Japan, 1999 by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
A dividing cell,
cell body μm long, μm wide,
x 400, x 640, Japan 1999, by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
P. putrinum Claparède and Lachmann:
Similar to P. bursaria in shape; but single contractile vacuole;
no symbiotic chlorella; 80-150 μm long; fresh water
(Kudo, 1966).
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