The phylum Ciliophora Doflein, 1901 is also known as Ciliata, ciliated protozoa or protists, Infusoria and Animalicules.
The Ciliophora includes about 10000 known species of some of the most complex single-celled organisms ever. They derive their name from the Latin word for "eyelash," which describes the appearance of many ciliates quite well: some or all of the surface of a ciliate is covered with relatively short, dense hairlike structures, the cilia, which beat to propel the ciliate through the water and/or to draw in food particles.