Cytherellidae is a family of ostracods, and is the only living family in the order, Platycopida, although the family Punciidae is also sometimes included. Members of the family have existed since the Jurassic. It contains 6 genera: \n* Cytherella Jones, 1849 \n* Cytherelloidea Alexander, 1929 \n* Grammcythella Swanson et al., 2005 \n* Inversacytherella Swanson et al., 2005 \n* Keijcyoidea Malz, 1981 \n* Platella Coryell & Fields, 1937