Phylum Schizoramia Bergström, 1976a see Phylum Arthropoda Siebold, 1848
   Superclass †Proschizoramia Hou & Bergström, 1997
     Class †Megacheira Hou & Bergström, 1997
       Order †Leanchoiliida Størmer, 1944, nom. corr.
         Family †Alalcomenaeidae Simonetta & Delle Cave, 1975
           1 Genus †Alalcomenaeus Simonetta, 1970