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Oligohymenophorea (formerly Nassophorea): Peniculida: Parameciidae

 Paramecium caudatum
Ehrenberg, 1838

Mating reaction

Paramecium caudatum mating reaction 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).
A scheme of mating-type determination; Mating reaction & pairs, by Y. Tsukii
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Mating reaction (a large mating clump), by Y. Tsukii
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Mating reaction (close view), by Y. Tsukii
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Mating reaction on a depression slide; Mating reaction occurring within each syngen, by Y. Tsukii
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Double mating reaction -> animation (in Japanese)
Paramecium caudatum, Mating reaction
Paramecium caudatum, Mating reaction Paramecium caudatum, Mating reaction Paramecium caudatum, Mating reaction Paramecium caudatum, Mating reaction Paramecium caudatum, Mating reaction
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Triple mating reaction: cells injested latex particles (white cells), aceto-carmine particles (red cells), china ink (black cells), by Y. Tsukii
Paramecium caudatum, Mating reaction Paramecium caudatum, Mating reaction Paramecium caudatum, Mating reaction
Paramecium caudatum, Mating reaction Paramecium caudatum, Mating reaction Paramecium caudatum, Mating reaction Paramecium caudatum, Mating reaction

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