Euarthropoda
   †Lamellipedia see Superclass Lamellipedia Hou & Bergström, 1997
     †Artiopoda Hou & Bergström, 1997 see Subphylum Artiopoda Hou & Bergström, 1997
       Order †Nektaspida Raymond, 1920 - nektaspids see Class Nektaspida Raymond, 1920
         Family †Liwiidae Dzik & Lendzion, 1988 see Subfamily Liwiinae Dzik & Lendzion, 1988
           1 Genus †Liwia Dzik & Lendzion, 1988
           2.1 Genus †Soomaspis Fortey & Theron, 1995
           2.2 Genus †Tariccoia Hammann et al., 1990