| Ploesoma Herrick, 1885 |
| Ploesoma hudsoni (Imhof, 1891) |
| Polyarthra Ehrenberg, 1834 |
| Polyarthra dolichoptera Idelson, 1925 |
| Polyarthra euryptera Wierzejski, 1891 |
| Polyarthra major Burckhardt, 1900 |
| Polyarthra remata Skorikov, 1896 |
| Polyarthra vulgaris Carlin, 1943 |
| Synchaeta Ehrenberg, 1832 |
| Synchaeta bicornis J. C. Smith, 1904 |
| Synchaeta hyperborea Smirnov, 1932 |
| Synchaeta longipes Gosse, 1887 |
| Synchaeta oblonga Ehrenberg, 1832 |
| Synchaeta pectinata Ehrenberg, 1832 |
| Synchaeta stylata Wierzejski, 1893 |
| Synchaeta tremula (O. F. Müller, 1786) |
| Synchaetidae Hudson & Gosse, 1886 |