Opinions from J. K. Rigby and D. Collins 2004
- 'Canistrumella is a subjective synonym of Petaloptyon'
- 'Capsospongia belongs to Anthaspidellidae'
- 'Corralia undulata belongs to Corralia' according to Walcott 1920
- 'Corralia undulata is recombined as Capsospongia undulata'
- 'Crumillospongia biporosa belongs to Crumillospongia' according to Rigby 1986
- 'Eiffelia globosa belongs to Eiffelia' according to Walcott 1920
- 'Eiffelospongia belongs to Eiffeliidae'
- 'Eiffelospongia hirsuta belongs to Eiffelospongia'
- 'Falospongia belongs to Hazeliidae'
- 'Falospongia falata belongs to Falospongia' according to Rigby 1986
- 'Falospongia ramosa belongs to Falospongia'
- 'Halichondrites belongs to Halichondritidae'
- 'Halichondrites elissa belongs to Halichondrites' according to Walcott 1920
- 'Hamptonia elongata belongs to Hamptonia'
- 'Hamptoniella belongs to Hamptoniidae'
- 'Hamptoniella foliata belongs to Hamptoniella'
- 'Hamptoniella hirsuta belongs to Hamptoniella'
- 'Hapalospongia belongs to Ulospongiellidae'
- 'Hapalospongia flexuosa belongs to Hapalospongia'
- 'Hazelia conferta belongs to Hazelia' according to Walcott 1920
- 'Hazelia crateria belongs to Hazelia' according to Rigby 1986
- 'Hazelia delicatula belongs to Hazelia' according to Walcott 1920
- 'Hazelia grandis belongs to Hazelia' according to Walcott 1920
- 'Hazelia lobata belongs to Hazelia'
- 'Hazelia luteria belongs to Hazelia' according to Rigby 1986
- 'Hazelia nodulifera belongs to Hazelia' according to Walcott 1920
- 'Hazelia obscura belongs to Hazelia' according to Walcott 1920
- 'Hazelia palmata belongs to Hazelia' according to Walcott 1920
- 'Leptomitella incepta belongs to Leptomitella'
- 'Leptomitus metta belongs to Leptomitus' according to Rigby 1983
- 'Leptomitus metta is recombined as Leptomitella metta'
- 'Leptomitus undulatus belongs to Leptomitus'
- 'Morania frondosa belongs to Morania' according to Walcott 1919
- 'Morania frondosa is recombined as Crumillospongia frondosa'
- 'Petaloptyon belongs to Eiffeliidae'
- 'Pirania muricata belongs to Pirania' according to Walcott 1920
- 'Protoprisma annulata belongs to Protoprisma'
- 'Stephenospongia belongs to Hintzespongiidae'
- 'Stephenospongia magnipora belongs to Stephenospongia' according to Rigby 1986
- 'Takakkawia belongs to Takakkawiidae'
- 'Takakkawia lineata belongs to Takakkawia' according to Walcott 1920
- 'Tuponia is a subjective synonym of Leptomitus'
- 'Tuponia bellilineata belongs to Tuponia' according to Walcott 1920
- 'Tuponia bellilineata is recombined as Fieldospongia bellilineata'
- 'Tuponia lineata belongs to Tuponia' according to Walcott 1920
- 'Tuponia lineata is recombined as Leptomitus lineatus'
- 'Ulospongiella belongs to Ulospongiellidae'
- 'Ulospongiella ancyla belongs to Ulospongiella'
- 'Vauxia densa belongs to Vauxia' according to Walcott 1920
- 'Vauxia dignata belongs to Vauxia' according to Walcott 1920
- 'Vauxia dignata is recombined as Hazelia dignata'
- 'Vauxia irregulara belongs to Vauxia'
- 'Vauxia venata belongs to Vauxia' according to Walcott 1920
- 'Wapkia belongs to Wapkiidae'
- 'Wapkia elongata belongs to Wapkia'
- 'Wapkia grandis belongs to Wapkia' according to Walcott 1920
- 'Wapkiidae belongs to Protomonaxonida'