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

<==o Nanopsocetae Pearman, 1936 [non Broadhead, 1950] [incl. Phthiraptera]
   |--+?- Phthiraptera (lice; luteet)
   |  `--o Liposcelididae
   |     |--o Embidopsocinae
   |     |  |-- Belapha Enderlein, 1917
   |     |  |-- Belaphopsocus Badonnel, 1955
   |     |  |--o Belaphotroctes Roesler, 1943
   |     |  |  `-- †B. ghesquierei Badonnel; Tert. SWNAm.
   |     |  |-- Chaetotroctes Badonnel, 1973
   |     |  |-- Embidopsocopsis Badonnel, 1973
   |     |  |-- Embidopsocus Hagen, 1866
   |     |  |  `-- †E. saxonicus GŁnther; Tert.. NEu.
   |     |  `-- Troctulus Badonnel, 1955
   |     `--o Liposcelidinae
   |        |-- Troglotroctes Lienhard, 1996
   |        `--o Liposcelis Motschulsky, 1852
   |           |== 113 other species
   |           |?- †L. sp.; Tert. SWNAm.
   |           |?- †L. atavus Enderlein; M.Eoc. NEu.
   |           |?- †L. resinata (Hagen); M.Eoc. NEu.
   |           |-- L. bostrychoptila
   |           |-- L. formicaria
   |           |-- L. myrmecophila
   |           `-- L. prenolepidis
   |--o Pachytroctidae
   |  |--o Tapinellinae
   |  |  |-- Nanopsocus Pearman, 1928
   |  |  |--o Psylloneura Enderlein, 1903
   |  |  |  `-- †P. perantiqua Cockerell; Tert. SEAs.
   |  |  `-- Tapinella Enderlein, 1908
   |  `--o Pachytroctinae
   |     |-- Antilopsocus Gurney, 1965
   |     |-- Leptotroctes Badonnel, 1973
   |     |-- Nymphotroctes Badonnel, 1931
   |     |-- Pachytroctes Enderlein, 1905
   |     |-- Peritroctes Ribaga, 1911
   |     |-- Psacadium Enderlein, 1908
   |     `-- Psyllotroctes Roesler, 1940
   `--o Sphaeropsocidae Kolbe, 1883 sensu Handlirsch, 1907 [Sphaeropsocini Kolbe, 1883; Sphaeropsocidae Handlirsch, 1907, Menon, 1942, Pearman, 1958, Bekker-Migdisova & Vishniakova, 1962; Mockford, 1993, Grimaldi & Engel, 2006]
      |-- †Sphaeropsocites lebanensis Grimaldi & Engel, 2006; L.Cret. SWAs.
      `--+-- †Sphaeropsocoides canadensis Grimaldi & Engel, 2006; U.Cret. WNAm.
         `--+-- †Sphaeropsocus kuenowii Hagen, 1882 [Sphaeropsocus künowii Hagen, 1882; Atropos succinica Hagen, 1882; Troctes succinicus (Hagen) Kolbe, 1883;  Palaeotroctes succinica (Hagen) Enderlein, 1911; Sphaeropsocus künowi]; Enderlein, 1911 (lapsus calami); Sphaeropsocus kuenowii Hagen; Grimaldi & Engel, 2006] M.Eoc. NEu.
            `==o Sphaeropsocopsis Badonnel, 1963; R. SAm., NAm.(intr.), Aust. SAf. [paraphyletic]
               |-- S. microps Badonnel, 1963
               `--+?- S. recens (Hickman, 1932) [Sphaeropsocus recens Hickman]
                  |?- S. argentina ( Badonnel, 1962)
                  |?- S. chilensis Badonnel, 1963
                  |?- S. valeriae Badonnel, 1967
                  |?- S. reisi Badonnel, 1972
                  |?- S. spinosa Badonnel, 1972
                  |?- S. valdiviensis Badonnel, 1972
                  `--+-- S. myrtleae Lienhard & Ashmole, 1999
                     `--o Badonnelia Pearman, 1953
                        |-- B. titei Pearman, 1953
                        |-- B. similis Badonnel, 1963
                        |-- B. castrii Badonnel, 1972
                        |-- B. granulosa Badonnel, 1972
                        `-- B. testacea Badonnel, 1972

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