Phylum Arthropoda Siebold, 1848 - arthropods
   Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
     Class Remipedia Yager, 1981 - remipedes
       Order Nectiopoda Schram, 1986
         1 Family Godzilliidae Schram, Yager & Emerson, 1986
         2 Family Speleonectidae Yager, 1981