Trichodinidae

Trichodinidae is a family of ciliates of the order Mobilida, class Oligohymenophorea. Members of the family are ectoparasites (or, alternatively, ectocommensals) of a wide variety of aquatic organisms, including fish, amphibians, hydrozoans, molluscs and crustaceans.

Genera
The family consists of four genera.
 * Dipartiella Stein, 1961
 * Paratrichodina Lom, 1963
 * Trichodina Ehrenberg, 1830
 * Trichodinella Srámek-Husek, 1953