Polysyncraton is a genus of tunicates belonging to the family Didemnidae. The genus has almost cosmopolitan distribution. Species: * Monniot F. & Monniot C., 2001 * Romanov, 1977 * Kott, 2004 * Van Name, 1902 * (Tokioka, 1952) * Kott, 2004 * Romanov, 1989 * (Tokioka, 1949) * Monniot F., 1974 * Lafargue, 1968 * Oliveira & Rocha, 2019 * Kott, 2008 * (Brément, 1913) * Kott, 2004 * Monniot F. & Monniot C., 2001 * (Michaelsen, 1924) * Hartmeyer, 1912 * Kott, 1962 * Redikorzev, 1913 * (Sluiter, 1909) * Kott, 2008 * Kott, 2001 * Kott, 1962 * (Sluiter, 1913) * Kott, 2001 * Romanov, 1989 * Kott, 2008 * Kott, 2001 * Nott, 1892 * Kott, 2004 * Kott, 2001 * Oliveira & Rocha, 2019 * Kott, 2007 * Lafargue, 1975 * Michaelsen, 1923 * M