| Species | Name Used |
|---|---|
| Didemnum candidum Savigny, 1816 | Didemnum candidum (p. ) |
| Didemnum grande (Herdman, 1886) | Didemnum grande (p. ) |
| Didemnum immundum Romanov, 1974 | Didemnum immundum (p. ) |
| Didemnum megaductus Romanov, 1974 | Didemnum megaductus (p. ) |
| Didemnum papillatum Romanov, 1974 | Didemnum papillatum (p. ) |
| Polysyncraton discoides Kott, 1962 | Polysyncraton discoides (p. ) |
| Polysyncraton krylatkae Romanov, 1974 | Polysyncraton krylatkae (p. ) |