Phylum Euarthropoda Lankester, 1904 see [unranked] Euarthropoda Subphylum †Artiopoda Hou & Bergström, 1997 Superclass †Trilobitomorpha Størmer, 1944 Class †Nektaspida Raymond, 1920 Family †Naraoiidae Walcott, 1912 Genus †Misszhouia Chen, Edgecombe & Ramsköld, 1997 [paraphyletic] †Misszhouia canadensis Mayers, Aria & Caron, 2018