(Hexactinosida) (Hexactinosida) is a biological order of the phylum Porifera (Sponges) and class Hexactinellida.
Aphrocallistidae
Craticulariidae
Cribrospongiidae
Dactylocalycidae
Euretidae
Farreidae
Tretodictyidae
Amphidiscosida
Aulocalycoida
Hexactinosida
Lychniscosida
Lyssacinosida