Didemnidae Giard, 1872
Polysyncraton adelon Monniot, & Monniot, 2001
Polysyncraton adenale Romanov, 1977
Polysyncraton alinguum Kott, 2004
Polysyncraton amethysteum (Van Name, 1902)
Polysyncraton arafurensis Tokioka, 1952
Polysyncraton arvum Kott, 2004
Polysyncraton asperum Romanov, 1989
Polysyncraton aspiculatum (Tokioka, 1949)
Polysyncraton asterix Monniot, 1975
Polysyncraton bilobatum Lafargue, 1968
Polysyncraton calculum Kott, 2008
Polysyncraton canetense Brément, 1913
Polysyncraton catillum Kott, 2004
Polysyncraton cerebellum Monniot, & Monniot, 2001
Polysyncraton chondrilla (Michaelsen, 1924)
Polysyncraton chuni Hartmeyer, 1912
Polysyncraton circulum Kott, 1962
Polysyncraton crassum Redikorzev, 1913
Polysyncraton cuculliferum (Sluiter, 1909)
Polysyncraton dealbatum Kott, 2008
Polysyncraton dentatum Kott, 2001
Polysyncraton discoides Kott, 1962
Polysyncraton doboense (Sluiter, 1913)
Polysyncraton dromide Kott, 2001
Polysyncraton echinatum Kott, 2001
Polysyncraton fadeevi Romanov, 1989
Polysyncraton fistulum Kott, 2008
Polysyncraton flammeum Kott, 2001
Polysyncraton fuscum Nott, 1892
Polysyncraton galaxum Kott, 2004
Polysyncraton glaucum Kott, 2001
Polysyncraton haranti Lafargue, 1975
Polysyncraton hartmeyeri Michaelsen, 1923
Polysyncraton infundibulum Kott, 2001
Polysyncraton jugosum (Herdman & Riddell, 1913)
Polysyncraton kashenkoi Romanov, 1989
Polysyncraton krylatkae Romanov, 1974
Polysyncraton lacazei (Giard, 1872)
Polysyncraton linere Kott, 2004
Polysyncraton lithostrotum (Brewin, 1956)
Polysyncraton lodix Kott, 2001
Polysyncraton longitubis Kott, 2004
Polysyncraton louminae Monniot, 1984
Polysyncraton luteum Kott, 2004
Polysyncraton magnetae Hastings, 1931
Polysyncraton magniferum
Polysyncraton magnilarvum (Millar, 1962)
Polysyncraton meandratum Monniot, 1993
Polysyncraton millepore Vasseur, 1969
Polysyncraton miniastrum Kott, 2004
Polysyncraton montanum Kott, 2004
Polysyncraton mortenseni (Michaelsen, 1924)
Polysyncraton mortensi (Michaelsen, 1924)
Polysyncraton multiforme Kott, 2001
Polysyncraton multipapilla Monniot, 1993
Polysyncraton multipapillae Monniot, 1993
Polysyncraton nigropunctatum Sluiter, 1909
Polysyncraton niveum Kott, 2004
Polysyncraton oceanium Kott, 2001
Polysyncraton orbiculum Kott, 1962
Polysyncraton otuetue Monniot & Monniot, 1987
Polysyncraton palliolum Kott, 2001
Polysyncraton papyrus Kott, 2001
Polysyncraton paradoxum Nott, 1892
Polysyncraton paramushiri Romanov, 1989
Polysyncraton pavimentum Monniot, 1993
Polysyncraton pedunculatum Kott, 2001
Polysyncraton peristroma Kott, 2004
Polysyncraton polysystema Kott, 2005
Polysyncraton pontoniae Monniot & Monniot, 1987
Polysyncraton poro Monniot & Monniot, 1987
Polysyncraton porou Monniot & Monniot, 1987
Polysyncraton pseudomagnetae Kott, 2004
Polysyncraton pseudorugosum Monniot, 1993
Polysyncraton pulchrum Kott, 2001
Polysyncraton purou Monniot & Monniot, 1987
Polysyncraton recurvatum (Sluiter, 1909)
Polysyncraton reedi Monniot & Monniot, 1994
Polysyncraton regulum Kott, 2001
Polysyncraton reticulum Kott, 2004
Polysyncraton rica Kott, 2001
Polysyncraton robustum Kott, 2001
Polysyncraton rostrum Monniot & Monniot, 1997
Polysyncraton rubitapum Kott, 2001
Polysyncraton rugosum Monniot, 1993
Polysyncraton sagamiana (Tokioka, 1953)
Polysyncraton scobinum Kott, 2001
Polysyncraton scorteum Kott, 2001
Polysyncraton shellensis Brunetti, 2007
Polysyncraton sideris Kott, 2001
Polysyncraton spongioides Hartmeyer, 1912
Polysyncraton tasmanense Kott, 2001
Polysyncraton tegetum Kott, 2001
Polysyncraton tenuicutis Kott, 2001
Polysyncraton textus Kott, 2004
Polysyncraton thallomorpha Monniot, 1993
Polysyncraton tokiokai Romanov, 1989
Polysyncraton trivolutum (Millar, 1960)
Polysyncraton turris Kott, 2004
Polysyncraton vestiens Monniot, & Monniot, 2001
Polysyncraton victoriensis Kott, 1976