Alveolata II - Ciliates
Cilia: large number of short flagella in longitudinal or spiral rows; beat synchronized for rapid locomotion
Heterotroph: Important grazers on bacteria; some contain symbiontic green algae, others show kleptoplastidy
Micro- and Macronuclei: micronuclei important for sexual reproduction by conjugation; diploid
Occurrence: freshwater and marine, some parasites