| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Ampharete arctica Malmgren 1866 | 0 | 0 | 13 |
| Ampharetidae | 12 | 0 | 39 |
| Amphicteis Grube 1850 | 2 | 0 | 15 |
| Amphicteis gunneri (M. Sars 1835) | 0 | 0 | 54 |
| Amphicteis sarsi McIntosh 1885 | 0 | 0 | 13 |
| Amphictene Savigny 1822 | 1 | 0 | 0 |
| Amphictene auricoma (O. F. Müller 1776) | 0 | 0 | 3 |
| Amphiglena Claparède 1864 | 3 | 0 | 37 |
| Amphiglena pacifica Annenkova 1934 | 0 | 0 | 12 |
| Amphiglena mediterranea (Leydig 1851) | 0 | 0 | 90 |
| Amphiglena nathae Rouse 1994 | 0 | 0 | 3 |
| Amphinomida | 2 | 0 | 0 |
| Amphinomidae | 3 | 0 | 40 |
| Amphisamytha Hessle 1917 | 1 | 0 | 14 |
| Amphisamytha galapagensis Zottoli 1983 | 0 | 0 | 16 |
