WHexactinellid
WAmphidiscosida
WAmphidiscosida
WAphrocallistidae
WAspidoscopulia
WCaulophacus elegans
WCloud sponge
WCoeloptychium
WEuplectellidae
WEuretidae
WEuretinae
WFarrea
WFarrea occa
WFarreidae
WLanuginellinae
WLefroyella
WRossellidae
WStaurocalyptus
WTretodictyidae
WUncinateridae
WVenus' flower basket