| Nominal Species (n = 21) | Present allocation (n = 14) | Ref. |
|---|---|---|
| Synchaeta apus Plate, 1834 | Synchaeta baltica | 75097 |
| Synchaeta baltica Ehrenberg, 1834 | Synchaeta baltica | 19 |
| Synchaeta bicornis Smith, 1904 | Synchaeta bicornis | 19 |
| Polyarthra dolichoptera Idelson, 1925 | Polyarthra dolichoptera | 19 |
| Gastroschiza flexilis Jägerskiold, 1892 | Ploesoma hudsoni | 75097 |
| Dictyoderma hypopus Lauterborn, 1893 | Ploesoma hudsoni | 75097 |
| Synchaeta johanseni Harring, 1921 | Synchaeta johanseni | 19 |
| Synchaeta longipes Gosse, 1887 | Synchaeta longipes | 19 |
| Polyarthra major Burckhardt, 1900 | Polyarthra major | 19 |
| Synchaeta mordax Gosse, 1851 | Synchaeta pectinata | 75097 |
| Synchaeta neglecta Zacharias, 1901 | Synchaeta tremula | 75097 |
| Synchaeta oblonga Ehrenberg, 1831 | Synchaeta oblonga | 19 |
| Synchaeta pectinata Ehrenberg, 1832 | Synchaeta pectinata | 19 |
| Polyarthra remata Skorikov, 1896 | Polyarthra remata | 19 |
| Ploesoma sibericum Daday, 1901 | Ploesoma hudsoni | 75097 |
| Synchaeta stylata Wierzejski, 1893 | Synchaeta stylata | 19 |
| Synchaeta tamara Smirnov, 1932 | Synchaeta tamara | 19 |
| Synchaeta truncata von Hofsten, 1909 | Synchaeta tremula | 75097 |
| Bipalpus vesiculosus Wierzejski & Zacharias, 1893 | Ploesoma hudsoni | 75097 |
| Polyarthra vulgaris Carlin, 1943 | Polyarthra vulgaris | 19 |
| Synchaeta wesenberglundi Pejler, 1957 | Synchaeta longipes | 75097 |