Phylum Euarthropoda Lankester, 1904 see [unranked] Euarthropoda
   Subphylum †Artiopoda Hou & Bergström, 1997
     Superclass †Trilobitomorpha Størmer, 1944
       1 Genus †Retifacies Hou, Chen & Lu, 1989
       2.1 Genus †Kwanyinaspis Zhang & Shu, 2005
       2.2.1 Class †Trilobita Walch, 1771 - trilobites
       2.2.2.1 Subclass †Conciliterga Hou & Bergström, 1997
       2.2.2.2.1 Genus †Arthroaspis Stein, Budd, Peel & Harper, 2013
       2.2.2.2.2 Class †Nektaspida Raymond, 1920