| Family | Genus | Species |
|---|---|---|
| Astracanthidae | 1 | 4 |
| Atlanticellidae | 1 | 2 |
| Aulacanthidae | 3 | 4 |
| Aulosphaeridae | 2 | 10 |
| Cannosphaeridae | 1 | 2 |
| Challengeriidae | 4 | 16 |
| Chlamydophryidae | 5 | 12 |
| Circoporidae | 1 | 1 |
| Coelodendridae | 1 | 2 |
| Concharidae | 2 | 5 |
| Ebriacea | 3 | 8 |
| Medusettidae | 2 | 3 |
| Phaeodinidae | 1 | 4 |
| Porospathidae | 1 | 1 |
| Protaspidae | 2 | 6 |
| Rhogostomidae | 3 | 28 |
| Sagosphaeridae | 1 | 1 |
| Tuscaroridae | 2 | 3 |
| Ventrifissuridae | 1 | 7 |