Oligohymenophorea
(formerly Nassophorea): Peniculida: Parameciidae
Paramecium caudatum
Ehrenberg, 1838
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).
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A scheme of mating-type determination; Mating reaction & pairs, by Y. Tsukii
Mating reaction (a large mating clump), by Y. Tsukii
Mating reaction (close view), by Y. Tsukii
Mating reaction on a depression slide; Mating reaction occurring within each syngen, by Y. Tsukii
Double mating reaction -> animation
(in Japanese)
Triple mating reaction:
cells injested latex particles (white cells), aceto-carmine particles (red cells), china ink (black cells), by Y. Tsukii
Please click on images for viewing enlarged.
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