Ascidiacea Nielsen, 1995
Agnesiidae Michaelsen, 1898
Agneziidae Monniot & Monniot, 1991
Ascidiidae Herdman, 1882
Cionidae Lahille, 1887
Clavelinidae Forbes & Hanley, 1848
Corellidae
Diazonidae Garstand, 1891
Didemnidae Giard, 1872
Dimeatidae Sanamyan, 2001
Euherdmanniidae
Holozoidae Berrill, 1950
Hypobythiidae Sluiter, 1895
Octacnemidae
Perophoridae Giard, 1872
Plurellidae Kott, 1973
Polycitoridae Michaelsen, 1904
Polyclinidae Milne-Edwards, 1841
Protopolyclinidae Kott, 1992
Pseudodistomidae Harant, 1931
Pycnoclavellidae Kott, 1990
Ritterellidae Kott, 1992
Stomozoidae Kott, 1990
