- Hexactinellida
- Amphidiscophora
- Amphidiscosida
- Hyalonematidae
- Monorhaphididae
- Pheronematidae
- Hexasterophora
- Hexactinosida
- Aphrocallistidae
- Aulocalycidae
- Craticurariidae
- Euretidae
- Farreidae
- Tretodictyidae
- Lychniscosida
- Aulocystidae
- Dactylocalycidae
- Lyssacinosida
- Caulophacidae
- Euplectellidae
- Leucopsacadidae
- Rossellidae
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