Hexapods - insects see Epiclass Hexapoda Latreille, 1825
   Class Diplura Börner, 1904
     Order Diplura Börner, 1904 - diplurans
       Family Japygidae Haliday, 1864 see Family Iapygidae Haliday, 1864
         Subfamily Japyginae Haliday, 1864 see Subfamily Iapyginae (Haliday, 1864) Womersley, 1939
           1 Genus Catajapyx Silvestri, 1932
           2 Genus Eojapyx Smith, 1960
           3 Genus Hecajapyx Smith, 1959
           4 Genus Holjapyx Silvestri, 1948
           5 Genus Japyx Haliday, 1864 see Genus Iapyx Haliday, 1864
           6 Genus Metajapyx (Silvestri, 1932)
           7 Genus Mixojapyx Silvestri, 1933
           8 Genus Nanojapyx Smith, 1959
           9 Genus Occasjapyx Silvestri, 1948