Tetrahymena Pyriformis
''Tetrahymena pyriformis'' is a species of Ciliophora in the family Tetrahymenidae Tetrahymenidae is a family of ciliates. References Ciliate families Oligohymenophorea {{ciliate-stub .... It is one of the most commonly ciliated model used for laboratory research. The species is widely distributed. It lives in fresh water like springs, ditches, creeks, ponds, and lakes. References {{Ciliate-stub Oligohymenophorea ...
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Ciliate
The ciliates are a group of alveolates characterized by the presence of hair-like organelles called cilia, which are identical in structure to eukaryotic flagella, but are in general shorter and present in much larger numbers, with a different undulating pattern than flagella. Cilia occur in all members of the group (although the peculiar Suctoria only have them for part of their life cycle) and are variously used in swimming, crawling, attachment, feeding, and sensation. Ciliates are an important group of protists, common almost anywhere there is water—in lakes, ponds, oceans, rivers, and soils. About 4,500 unique free-living species have been described, and the potential number of extant species is estimated at 27,000–40,000. Included in this number are many ectosymbiotic and endosymbiotic species, as well as some obligate and opportunistic parasites. Ciliate species range in size from as little as 10 µm in some colpodeans to as much as 4 mm in length in s ...
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