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 †Groenlandibelida Khromov, 1990 Family †Groenlandibelidae Jeletzky, 1966