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Oligohymenophorea: Hymenostomatia: Hymenostomatida: Tetrahymenidae

Tetrahymena thermophila

Tetrahymena Genus: Oral polykinetids straight, never sigmoid (Illustrated Guide, 1985). Small, ovoid or pyriform, anterior pointed; cytostome anterior 1/3 of body where an undulating membrane on the right and three small membranelles on the left; macrostome forms with large buccal ciliation; somatic ciliation complete; a contractile vacuole terminal; a spherical macronucleus central (Carey, 1992).

Tetrahymena thermophila, axenic culture, cell body 55-80 μm long, 27-37 μm wide, x 400, Japan, 199? by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Tetrahymena Tetrahymena

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