The Colpodea are a class of
ciliate
The ciliates are a group of alveolates characterized by the presence of hair-like organelles called cilia, which are identical in structure to flagellum, eukaryotic flagella, but are in general shorter and present in much larger numbers, with a ...
s, of about 200 species common in freshwater and soil habitats. The body cilia are typically uniform, and are supported by