Opinions from R.E.H. Reid 2004
- 'Alosculum belongs to Euretinae'
- 'Arhoussia belongs to Taegerinae'
- 'Asemematidae belongs to Lyssacinosa'
- 'Asemematinae belongs to Asemematidae'
- 'Aulacosia belongs to Laocoetidinae'
- 'Belonisia belongs to Euretidae'
- 'Blondetia belongs to Euretinae'
- 'Calycomorpha belongs to Lyssacinosa'
- 'Carinthiaspongus belongs to Hexactinosa'
- 'Caseispongia belongs to Hexactinosa'
- 'Caulophacinae belongs to Asemematidae'
- 'Caulophacus belongs to Caulophacinae'
- 'Cincliderma belongs to Placotrematinae'
- 'Crateromorpha belongs to Rossellinae'
- 'Craticulariidae belongs to Hexactinosa'
- 'Diphyllospira belongs to Craticulariinae'
- 'Emploca belongs to Emplocidae'
- 'Emplocidae belongs to Hexactinosa'
- 'Epaphroditus is replaced by Nitidus' according to de Laubenfels 1955
- 'Eubrochus belongs to Cribrospongiidae'
- 'Euplectella belongs to Euplectellinae'
- 'Euplectellidae belongs to Lyssacinosa'
- 'Euplectellina belongs to Euplectellidae'
- 'Euplectellinae belongs to Euplectellidae'
- 'Euretidae belongs to Hexactinosa'
- 'Euryplegma belongs to Euryplegmatidae'
- 'Euryplegmatidae belongs to Hexactinosa'
- 'Eutactostomium belongs to Craticulariinae'
- 'Farrea belongs to Farreidae'
- 'Farreidae belongs to Hexactinosa'
- 'Fieldingia belongs to Placotrematinae'
- 'Furcicanalis belongs to Hexactinosa'
- 'Gomphites belongs to Lyssacinosa'
- 'Guemeuria belongs to Taegerinae'
- 'Hexactinella (Hexactinella) belongs to Hexactinella'
- 'Hexactinella ventilabrum belongs to Hexactinella' according to Carter 1885
- 'Hexactinella ventilabrum is recombined as Hexactinella (Hexactinella) ventilabrum'
- 'Hexactinosa belongs to Hexasterophora'
- 'Imbricareola belongs to Hexactinosa'
- 'Koleostoma was reranked as Guettardiscyphia (Koleostoma) and belongs to Guettardiscyphia'
- 'Krainerella belongs to Lyssacinosa'
- 'Leptophragmella belongs to Leptophragmatinae'
- 'Leucopsacidae belongs to Lyssacinosa'
- 'Lopanella belongs to Euretinae'
- 'Lychniscosa belongs to Hexactinellida'
- 'Mastodictyum belongs to Euretinae'
- 'Mimeticosia belongs to Craticulariidae'
- 'Misonia belongs to Hexactinosa'
- 'Multiloqua belongs to Hexactinosa'
- 'Mysterium belongs to Hexactinosa'
- 'Nitidus is a subjective synonym of Psilocalyx'
- 'Octobrum belongs to Hexactinosa'
- 'Opeamorphus belongs to Lyssacinosa'
- 'Parahexactinella was reranked as Hexactinella (Parahexactinella) and belongs to Hexactinella'
- 'Petalope belongs to Cribrospongiidae'
- 'Pheronema belongs to Pheronematidae'
- 'Pheronematidae belongs to Lyssacinosa'
- 'Placochlaenia belongs to Staurodermatidae'
- 'Plecteurete is corrected as Plecteurette and belongs to Euretinae'
- 'Plectospyris belongs to Euretinae'
- 'Polyschema belongs to Staurodermatidae'
- 'Porospongia belongs to Hexactinosa'
- 'Proeuplectella belongs to Taegerinae'
- 'Psephosyllogus belongs to Craticulariinae'
- 'Pseudoguettardia belongs to Leptophragmatinae'
- 'Psilocalyx belongs to Tretodictyinae'
- 'Purisiphonia belongs to Taegerinae'
- 'Pyritonema belongs to Lyssacinosa'
- 'Reguantella belongs to Leucopsacidae'
- 'Rhogostomium belongs to Hexactinosa'
- 'Rhombedonium belongs to Hexactinosa'
- 'Rossellidae belongs to Lyssacinosa'
- 'Rossellinae belongs to Rossellidae'
- 'Scotospongia belongs to Hexactinosa'
- 'Semperella belongs to Pheronematidae'
- 'Synaulia belongs to Craticulariidae'
- 'Tagountia belongs to Taegerinae'
- 'Tesselispongia belongs to Hexactinosa'
- 'Tillichtia belongs to Taegerinae'
- 'Tremaphorus belongs to Hexactinosa'
- 'Tretochone belongs to Chonelasmatinae'
- 'Tretodictyum latum belongs to Tretodictyum' according to Schulze 1887
- 'Tretodictyum latum is recombined as Hexactinella (Parahexactinella) latum'
- 'Trimonactinophora belongs to Lyssacinosa'
- 'Vermifistula belongs to Hexactinosa'
- 'Walcottella is an objective synonym of Keuppiella'
- 'Zittelispongia belongs to Euretinae'
- 'Zittellospongia belongs to Staurodermatidae'
- 'Zittelospongia is an objective synonym of Zittellospongia'