Family
Chaetetidae Milne-Edwards et Haime, 1850
List of species
1. Chaetetes hemisphaericus (Eichwald, 1829) | Haljala Stage
Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Porifera |
| Class | Demospongea |
| Order | Chaetetida |
| Family | Chaetetidae |
| Subfamily | Chaetetinae |
| Family | Cryptolichenariidae |
| Desmidoporidae | |
| Tiverinidae |