| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Bosminidae (bosminid waterfleas) | 1 | 1 | 0 |
| Botryococcaceae | 1 | 0 | 0 |
| Botryosphaerella sudetica | 0 | 7 | 0 |
| Brachionidae | 5 | 14 | 0 |
| Brachionus | 0 | 9 | 0 |
| Brachionus angularis bidens Plate 1851 | 0 | 2 | 0 |
| Brachionus bidentatus Anderson 1889 | 0 | 4 | 0 |
| Brachiopoda (lamp shells) | 1 | 0 | 0 |
| Bryozoa (moss animals) | 2 | 4 | 0 |
| Bryozoa (moss animals) | 0 | 4 | 0 |
| Bumilleria sicula | 0 | 1 | 0 |
| Burkholderiales | 1 | 1 | 0 |
| Bursaria truncatella | 0 | 1 | 0 |
| Bursariidae | 1 | 1 | 0 |
| Bursariomorphida | 1 | 1 | 0 |
