Paramecium Paramecium

Nassophorea: Nassophoria: Peniculida: Parameciidae

Paramecium sp.

Paramecium 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).

Paramecium, cell body μm long, μm wide, x 400, x 640, Uruguay Nov. 1999, photo by Y. Tsukii
50 um 100 um 150 um; x 400 : 31 um 63 um 94 um; x 640

A macronucleus with a large inclusion body

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