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 Genus †Tariccoia Hammann et al., 1990 1 †Tariccoia arrusensis Hammann et al., 1990