Sibling Taxa
- Australomedusidae
- Balellidae
- Bougainvilliidae
- Bythotiaridae
- Clathrozoellidae
- Cordylophoridae
- Cytaeididae
- Eucodoniidae
- Eudendriidae
- Heterotentaculidae
- Hydractiniidae
- Hydrichthyidae
- Jeanbouilloniidae
- Magapiidae
- Niobiidae
- Oceaniidae
- Pandeidae
- Proboscidactylidae
- Protiaridae
- Protulophila
- Ptilocodiidae
- Rathkeidae
- Rhysiidae
- Similiclavidae
- Stylasteridae
- Trichydridae
- Tubiclavoididae