Class Cephalopoda Cuvier, 1795 - cephalopods
   Subclass Coleoidea Bather, 1888
     Superorder Decembrachiata Winckworth, 1932 see Superorder Decapodiformes Young, Vecchione & Donovan, 1998
       Order Spirulida Pompeckj, 1912
         Suborder Spirulina Pompeckj, 1912
           1 Family †Spirulirostridae Naef, 1921
           2 Family †Spirulirostrinidae Naef, 1921
           3 Family Spirulidae Rafinesque, 1815