Euarthropoda †Lamellipedia see Superclass Lamellipedia Hou & Bergström, 1997 †Artiopoda Hou & Bergström, 1997 see Subphylum Artiopoda Hou & Bergström, 1997 †Retifaciida see Order Retifaciida Hou & Bergström, 1997 Genus †Pygmaclypeatus Zhang, Han & Shu, 2000 †Pygmaclypeatus daziensis Zhang et al., 2000