''Tetrahymena pyriformis'' is a species of
Ciliophora
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 ...
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