After Parker, 1982, “The Tree of Life”, Lienhard, 2002, and Grimaldi & Engel, 2005

<==o Homilopsocidea
   |--o Bryopsocidae
   |  `-- Bryopsocus Thornton, Wong & Smithers, 1977
   |-- Elipsocidae
   |--o Philotarsidae
   |  |--o Philotarsinae
   |  |  |-- Haplophallus Thornton, 1959
   |  |  `--o Philotarsus Kolbe, 1880
   |  |     |-- †P. antiquus Kolbe; M.Eoc. NEu.
   |  |     `-- †P. bullicornis Enderlein; M.Eoc. NEu.
   |  `--o Aaroniellinae
   |     |-- Aaroniella Mockford, 1951
   |     |-- Philotarsopsis Tillyard, 1923
   |     `-- Tarsophilus Mockford & Broadhead, 1982
   |--o Mesopsocidae
   |  |-- Cyrtopsochus Costa, 1885
   |  |-- Hexacyrtoma Enderlein, 1908
   |  |-- Idatenopsocus Yoshizawa & Lienhard, 1997
   |  |-- Mesopsocidus Badonnel & Lienhard, 1988
   |  |-- Mesopsocopsis Badonnel & Lienhard, 1988
   |  |-- Mesopsocus Kolbe, 1880
   |  |-- Metapsocus Badonnel, 1982
   |  |-- Microtrichipsocus Badonnel & Lienhard, 1988
   |  |-- Newipsocus Badonnel & Lienhard, 1988
   |  |-- Psoculidus Badonnel & Lienhard, 1988
   |  |-- Psoculus Roesler, 1954
   |  `-- Rhinopsocus Badonnel & Lienhard, 1987
   |-- Lachesillidae
   |--o Peripsocidae
   |  |?- †Peripsocidae gen. indet. [Plio. CEu.]
   |  |-- Bicuspidatus Li Fasheng, 1993
   |  |-- Coniperipsocus Li Fasheng, 1997
   |  |-- Cycloperipsocus Li Fasheng, 1993
   |  |-- Diplopsocus Li Fasheng & Mockford, 1993
   |  |-- Kaestneriella Roesler, 1943
   |  |-- Peripsocus Hagen, 1866
   |  |-- Periterminalis Li Fasheng, 1997
   |  |-- Properipsocus Li Fasheng, 1995
   |  `-- Turriperipsocus Li Fasheng, 1997
   |--o Ectopsocidae
   |  |-- Ectianoculus Li Fasheng, 1995
   |  |-- Ectopsocopsis Badonnel, 1955
   |  |--o Ectopsocus McLachlan, 1899
   |  |  `-- †E. sp.; Tert. SWNAm.
   |  `-- Mascaropsocus Badonnel & Pearman, 1971
   |?-o Hemipsocidae [treated as Psocetae by Lienhard & Smithers, 2002]
   |  |-- Anopistoscena Enderlein, 1912
   |  |-- Hemipsocus Selys-Longchamps, 1872
   |  `-- Metahemipsocus Li Fasheng, 1995
   |--o Calopsocidae
   |  |--o Callistopterinae
   |  |  `-- Callistoptera Enderlein, 1903
   |  `--o Calopsocinae
   |     |-- Calopsocus Hagen, 1866
   |     |-- Calosema Thornton & Smithers, 1984
   |     |-- Cyclopsocus Thornton & Smithers, 1984
   |     |-- Dendropsocus Thornton & Smithers, 1984
   |     |-- Nemupsocus New, 1978
   |     |-- Neurosema McLachlan, 1866
   |     `-- Torrepsocus Thornton & Smithers, 1984
   |-- Pseudocaeciliidae
   `--o Trichopsocidae
      |--o Palaeopsocus Kolbe, 1883
      |  `-- †P. tener (Hagen); M.Eoc. NEu.
      `--o Trichopsocus Kolbe, 1882
         `-- †T. maculosus Mockford; M.Eoc. NEu.

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