Phylum Arthropoda Siebold, 1848 - arthropods
   Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
     Class Maxillopoda Dahl, 1956 see Subphylum Pancrustacea Zrzavý et al., 1997
       Subclass Tantulocarida Boxshall & Lincoln, 1983 - tantulocarids
         1 Family Basipodellidae Boxshall & Lincoln, 1983
         2 Family Deoterthridae Boxshall & Lincoln, 1987
         3 Family Doryphallophoridae Huys, 1991
         4 Family Microdajidae Boxshall & Lincoln, 1987
         5 Family Onceroxenidae Huys, 1991