living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Arthropoda Siebold, 1848 - arthropods
           Subphylum Uniramia Snodgrass, 1935 see Phylum Arthropoda Siebold, 1848
             Class Insecta Linnaeus, 1758 - insects
               Subclass Pterygota Lang, 1888 - winged insects see Infraclass Pterygota Lang, 1888
                 Infraclass Neoptera Martynov, 1923 - modern, wing-folding insects see Division Neoptera Martynov, 1923
                   Superorder Hemipterodea see Subdivision Paraneoptera
                     Order Psocoptera Shipley, 1904 - book and bark lice
                       Suborder Psocomorpha Roesler, 1944
                         Group Homilopsocidea Pearman, 1936
                           Family Mesopsocidae Enderlein, 1903
                             1 Genus Gibbopsocus Badonnel, 1976
                             2 Genus Hexacyrtoma Enderlein, 1908
                             3 Genus Labocoria Enderlein, 1910
                             4 Genus Mesopsocus Kolbe, 1880
                             5 Genus Psoculus Roesler, 1954