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Oligohymenophorea (formerly Nassophorea): Peniculida: Parameciidae

 Paramecium caudatum
Ehrenberg, 1838

Food-vacuole formation

Endocytosis or phagocytosis
Paramecium caudatum Genus: Cigar- or foot-shaped; a single macronucleus and 1 to several vesicular or compact micronuclei (Kudo, 1966).
Species: 180-300 μm long; a compact micronucleus; two contractile vacuoles (Kudo, 1966). Cylindrical or cigar-shaped; rounded anteriorly, pointed posteriorly; one large compact micronucleus ("caudatum" group) approximately 8 μm diam.; two contractile vacuoles; 170-290 μm long (Wichterman, 1986). Elongate, rounded anteriorly, pointed posteriorly; caudal cilia present; 180-280 μm long; a single macronucleus with a single micronucleus; two contractile vacuoles (Carey, 1992).
Paramecium caudatum (or P. aurelia ?), food-vacuole formation (phagocytosis or endocytosis), cell body 135 μm long, 50 μm wide, x 400, x 640, Saitama Pref., Japan, April 1999, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400 : scale 31 μm scale 63 μm scale 94 μm; x 640
Paramecium caudatum Paramecium caudatum Paramecium caudatum Paramecium caudatum Paramecium caudatum Paramecium caudatum Paramecium caudatum Paramecium caudatum Paramecium caudatum

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