Kingdom [Animalia] Linnaeus, 1758 - animals
   Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake 1997, nom. cl. inval. - ecdysozoans see Clade Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake 1997 [Lake, Halanych, Servin & Garey 2020]
     Panarthropoda Nielsen, 1995 - panarthropods
       Tritocerebra see [unranked] Tactopoda Budd, 2001
         Phylum Arthropoda Siebold, 1848 - arthropods
           Subphylum Mandibulata Snodgrass, 1938
             Infraphylum Atelocerata see [unranked] Mandibulata
               Superclass Panhexapoda
                 Epiclass Hexapoda Latreille, 1825 see Superclass Hexapoda Latreille, 1825
                   Class Insecta Linnaeus, 1758 - insects
                     Order Archaeognatha Börner, 1904 - bristletails
                       Family Machilidae Grassi, 1888
                         1 Genus Petrobius Leach, 1809 - firebrat