image_list image_listE

Oligohymenophorea (formerly Nassophorea): Peniculida: Parameciidae

Paramecium caudatum
Ehrenberg, 1838

Conjugating pair between micro- and amicronucleate cell

Paramecium caudatum conjugating pair amicronucleate 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).

P. caudatum; conjugating pair between micro- and amicronucleate cell;
double-stained by Feulgen reaction and Fast green; by A. Yanagi
Paramecium caudatum, conjugating pairs Paramecium caudatum, conjugating pairs Paramecium caudatum, conjugating pairs Paramecium caudatum, conjugating pairs Paramecium caudatum, conjugating pairs
Paramecium caudatum, conjugating pairs

P. caudatum; conjugating pair between micro- and amicronucleate cell;
vinblastine-induced pycnosis of all micronuclei; double-stained by
Feulgen reaction and Fast green; by A. Yanagi
Paramecium caudatum, conjugating pairs Paramecium caudatum, conjugating pairs Paramecium caudatum, conjugating pairs Paramecium caudatum, conjugating pairs

Please click on images for viewing enlarged.
Copyright Protist Information Server