• Ciona Fleming, 1822
• Ciona abdominalis Sluiter, 1898 accepted as Rhopalaea abdominalis (Sluiter, 1898)
• Ciona antarctica Hartmeyer, 1911
• Ciona aspera Herdman, 1886 accepted as Ciona savignyi Herdman, 1882
• Ciona canina (Mueller, 1776) accepted as Ciona intestinalis (Linnaeus, 1767)
• Ciona diaphanea (Quoy & Gaimard, 1834) accepted as Ciona intestinalis (Linnaeus, 1767)
• Ciona edwardsi Roule, 1884
• Ciona fascicularis Hancock, 1870
• Ciona flemingi Herdman, 1880 accepted as Rhopalaea flemingi (Herdman, 1880)
• Ciona gefesti Sanamyan, 1998 accepted as Ciona pomponiae Monniot C. & Monniot F., 1989
• Ciona gelatinosa Bonnevie, 1896
• Ciona hoshinoi Monniot C., 1991
• Ciona imperfecta Monniot C. & Monniot F., 1977
• Ciona indica Sluiter, 1904 accepted as Rhopalaea crassa (Herdman, 1880)
• Ciona intermedia Mastrototaro, 2020
• Ciona intestinalis (Linnaeus, 1767)
• Ciona longissima Hartmeyer, 1899
• Ciona mollis Ritter, 1907
• Ciona ocellata (Agassiz, 1850) accepted as Ciona intestinalis (Linnaeus, 1767)
• Ciona pomponiae Monniot C. & Monniot F., 1989
• Ciona pulchella (Alder, 1863) accepted as Ciona intestinalis (Linnaeus, 1767)
• Ciona robusta Hoshino & Tokioka, 1967
• Ciona roulii Lahille, 1887
• Ciona savignyi Herdman, 1882
• Ciona sheikoi Sanamyan, 1998
• Ciona sociabilis (Gunnerus, 1765) accepted as Ciona intestinalis (Linnaeus, 1767)
• Ciona tenella (Stimpson, 1852) accepted as Ciona intestinalis (Linnaeus, 1767)
• Cionanchora de Laubenfels, 1936 accepted as Discorhabdella Dendy, 1924
• Cionanchora tuberosocapitata (Topsent, 1890) accepted as Discorhabdella tuberosocapitata (Topsent, 1890)