Phylum Schizoramia Bergström, 1976a see Phylum Arthropoda Siebold, 1848 Superclass †Proschizoramia Hou & Bergström, 1997 ?Order †Acanthomeridiida Hou & Bergström, 1997 Family †Acanthomeridiidae Hou & Bergström, 1997 Genus †Acanthomeridion Hou et al., 1989 1 †Acanthomeridion serratum Hou et al., 1989