| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Amage Malmgren 1866 | 1 | 0 | 0 |
| Amage auricula Malmgren 1866 | 0 | 0 | 1 |
| Ammodiscidae | 2 | 0 | 0 |
| Ammodiscus Reuss 1862 | 1 | 0 | 0 |
| Ammodiscus planus Loeblich 1946 | 0 | 0 | 1 |
| Ammosphaeroidinidae | 1 | 0 | 0 |
| Ammotium Loeblich & Tappan 1953 | 1 | 0 | 0 |
| Ammotium cassis (Parker 1870) | 0 | 0 | 1 |
| Ampelisca Krøyer 1842 | 2 | 0 | 0 |
| Ampelisca eschrichtii Krøyer 1842 | 0 | 0 | 1 |
| Ampelisca macrocephala Liljeborg 1852 | 0 | 0 | 1 |
| Ampeliscidae Krøyer 1842 | 3 | 0 | 0 |
| Ampharete Malmgren 1866 | 2 | 0 | 0 |
| Ampharete lindstroemi Malmgren 1867 | 0 | 0 | 1 |
| Ampharete vega (Wirén 1883) | 0 | 0 | 1 |
