Polyclinidae Milne-Edwards, 1841
Atopogaster aurantiaca Herdman, 1886
Macroclinum diligens Sluiter, 1915
Macroclinum recedens Sluiter, 1915
Synoicum adareanum (Herdman, 1902)
Synoicum angustum Kott, 1992
Synoicum apectetum Millar, 1982
Synoicum arenaceum (Michaelsen, 1924)
Synoicum atlanticum Millar, 1968
Synoicum atopogaster Kott, 1963
Synoicum australe Millar, 1962
Synoicum beauchampi (Harant, 1927)
Synoicum blochmanni (Heiden, 1894)
Synoicum bowerbanki Millar, 1963
Synoicum buccinum Kott, 1992
Synoicum californianum Brunetti, 2007
Synoicum calypsonis (Peres, 1956)
Synoicum capense Millar, 1962
Synoicum castellatum Kott, 1992
Synoicum chrysanthemum Kott, 1992
Synoicum citrinum Monniot, F. & Monniot, C., 2006
Synoicum citrum Kott, 1992
Synoicum clavatum (Oka, 1927)
Synoicum concavitum Kott, 1992
Synoicum cymosum Redikorzev, 1927
Synoicum daucum Monniot & Monniot, 1977
Synoicum derjugini Redikorzev, 1927
Synoicum diaphanum Sluiter, 1927
Synoicum duboscqui (Harant, 1927)
Synoicum erectum Kott, 1992
Synoicum floriferum Monniot, F. & Monniot, C., 2006
Synoicum galei Kott, 1992
Synoicum georgianum Sluiter, 1932
Synoicum giardi (Herdman, 1886)
Synoicum haurakiensis Brewin, 1951
Synoicum herdmani Brewin, 1956
Synoicum howeni Monniot & Monniot, 1988
Synoicum hypurgon Michaelsen, 1924
Synoicum implicatum Kott, 2008
Synoicum incrustatum (Sars, 1851)
Synoicum insulsum (Sluiter, 1898)
Synoicum intercedens (Sluiter, 1909)
Synoicum irregulare Ritter, 1899
Synoicum jordani (Ritter, 1899)
Synoicum kerguelenense (Hartmeyer, 1911)
Synoicum kincaidi (Ritter, 1899)
Synoicum kinkaidi (Ritter, 1899)
Synoicum kuranui Brewin, 1950
Synoicum laboutei. Monniot, F. & Monniot, C., 2006
Synoicum lacazei (Pérès, 1957)
Synoicum longistriatum Kott, 1992
Synoicum macroglossum (Hartmeyer, 1919)
Synoicum molle (Herdman, 1886)
Synoicum obscurum Kott, 1992
Synoicum occidentalis Millar, 1982
Synoicum ostentor Monniot & Monniot, 1983
Synoicum otagoensis Millar, 1982
Synoicum papilliferum (Michaelsen, 1930)
Synoicum parfustis (Ritter & Forsyth, 1917)
Synoicum parvum Redikorzev, 1937
Synoicum pellucens Redikorzev, 1927
Synoicum pellucidum (Ritter & Forsyth, 1917)
Synoicum pererratum (Sluiter, 1912)
Synoicum perreratum (Sluiter, 1912)
Synoicum polygyna Monniot & Monniot, 1980
Synoicum pomum (Sars, 1851)
Synoicum pribilovense (Ritter, 1899)
Synoicum prunum (Herdman, 1899)
Synoicum pseudogrisiatum Kott, 2008
Synoicum pulmonaria (Ellis & Solander, 1786)
Synoicum ramulosum Kott, 1969
Synoicum rapum Kott, 2008
Synoicum sabuliferum Redikorzev, 1927
Synoicum sacculum Kott, 1992
Synoicum sagamianum Tokioka, 1962
Synoicum salivum Monniot & Gaill, 1978
Synoicum saxeum Kott, 1998
Synoicum senegalense (Peres, 1949)
Synoicum snodgrassi (Ritter, 1899)
Synoicum solidum Redikorzev, 1937
Synoicum sphinctorum Kott, 2006
Synoicum stewartense (Michaelsen, 1924)
Synoicum stewartensis (Michaelsen, 1924)
Synoicum suarenum Kott, 1992
Synoicum syrtis Kott, 2006
Synoicum tentaculatum Kott, 1969
Synoicum tentucalatum Kott, 1969
Synoicum tropicum (Sluiter, 1909)
Synoicum turgens Phipps, 1774
Synoicum vesica Kott, 2008
Synoicum vibei Lützen, 1959