Tetrahymena pyriformis as illustrated in Shen & Zhang (1990) Biomonitoring Techniques Using Freshwater Microbiota, China Architecture and Building Press. This image was taken with permission from Modern Biomonitoring Techniques Using Freshwater Microbiota written by Shen Yunfen, Zhang Zongshe and colleagues, and published by China Architecture and Building Press in 1990. Image copyright: China Architecture and Building Press, used under license to MBL (micro*scope).
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From the collection
Protozoan biomonitors in China
|Description of Tetrahymena pyriformis: A species complex of hymenostome ciliates, 25-90 micrometres long. Body ovoid, narrowing anteriorly. Mouth pear-shaped, or approximately triangular, in the anterior quarter, parallel to longitudinal axis of the cell; with undulating membrane on the right and three small membranelles on the left. Uniformly ciliated, in longitudinal rows; with straight preoral suture. One spherical macronucleus, central; one contractile vacuole, subterminal. Bacterivore; in fresh water.