After Mees, 2012 [“WoRMS - World Register of Marine Species”]

<==o Lophogastrida Sars, 1870
   |--o Eucopiidae Sars, 1885
   |  |--o †Schimperella Bill, 1914
   |  |  |-- †S. acanthocercus Taylor, Schram & Yan-Bin, 2001
   |  |  |-- †S. beneckii Bill, 1914
   |  |  `-- †S. kessleri Bill, 1914
   |  `--o Eucopia Dana, 1852 [Chalaraspis Willemoes-Suhm, 1875]
   |     |-- †E. praecursor Secretan & Riou, 1986
   |     |-- E. australis Dana, 1852
   |     |-- E. crassicornis Casanova, 1997
   |     |-- E. grimaldii Nouvel, 1942
   |     |-- E. linguicauda O. Tattersall, 1955
   |     |-- E. major Hansen, 1910
   |     |-- E. panayensis Bacescu, 1991
   |     |-- E. sculpticauda Faxon, 1893 [Eucopia hanseni Nouvel, 1942; Eucopia equatoria Spence-Bate, 1855; Eucopia intermedia Hansen, 1905]
   |     `-- E. unguiculata (Willemoes-Suhm, 1875)
   |--o Gnathophausia Willemoes-Suhm, 1875 [Neognathophausia Petryashov, 1992] [Gnathophausiidae Udrescu, 1984]
   |  |-- G. affinis G. O. Sars, 1883
   |  |-- G. childressi Casanova, 1996
   |  |-- G. elegans G. O. Sars, 1883
   |  |-- G. fagei Casanova, 1996
   |  |-- G. gigas Willemoes-Suhm, 1875 [Gnathophausia drepanephora Holt & Tattersall, 1905]
   |  |-- G. gracilis Willemoes-Suhm, 1875 [Gnathophausia brevispinis Wood-Mason & Alcock, 1891; Gnathophausia dentata Faxon, 1895; Gnathophausia bidentata Illig, 1906]
   |  |-- G. ingens (Dohrn, 1870) [Lophogaster ingens Dohrn, 1870; Neognathophausia ingens (Dohrn, 1870); Gnathophausia inflata Willemoes-Suhm, 1873; Gnathophausia calcarata G.O. Sars, 1883; Gnathophausia bengalensis Wood-Mason & Alcock, 1891; Gnathophausia doryphora Illig, 1906]
   |  |-- G. longispina G. O. Sars, 1883
   |  |-- G. scapularis Ortmann, 1906
   |  `-- G. zoea Willemoes-Suhm, 1875 [Gnathophausia willemoesii G.O. Sars, 1883; Gnathophausia sarsii Wood-Mason & Alcock, 1891; Gnathophausia cristata Illig, 1906]
   `--o Lophogastridae Sars, 1870
      |-- Ceratolepis hamata G.O. Sars, 1883
      |-- Chalaraspidum alatum (Willemoes-Suhm, 1876) W.-Suhm, 1875 [Eclytaspis Faxon, 1895; Eclytaspis alata Willemoes-Suhm, 1876]
      |--o Lophogaster M. Sars, 1857
      |  |-- L. affinis Colosi, 1930
      |  |-- L. americanus W. Tattersall, 1951
      |  |-- L. anoplos Casanova, 1997
      |  |-- L. challengeri Fage, 1942
      |  |-- L. erythraeus Colosi, 1930
      |  |-- L. eurylepis Bamber & Clark, 2004
      |  |-- L. hawaiensis Fage, 1940
      |  |-- L. inermis Casanova, 1996
      |  |-- L. intermedius Hansen, 1910
      |  |-- L. japonicus W. Tattersall, 1951
      |  |-- L. longirostris Faxon, 1896
      |  |-- L. manilae Bacescu, 1985
      |  |-- L. multispinosus Fage, 1940
      |  |-- L. muranoi Fukuoka, Hoffmeyer & Vinas, 1997
      |  |-- L. musorstomi Bacescu, 1991
      |  |-- L. neocaladonensis Casanova, 1993
      |  |-- L. pacificus Fage, 1940
      |  |-- L. rotundatus Illig, 1930
      |  |-- L. schmidti Fage, 1940
      |  |-- L. spinosus Ortmann, 1906
      |  |-- L. subglaber Hansen, 1927
      |  |-- L. typicus M. Sars, 1857
      |  `-- L. voultensis Secretan & Riou, 1986 †
      |-- Parachalaraspis vitjazi Birstein & Tchindonova, 1958
      |--o Paralophogaster Hansen, 1910
      |  |-- P. atlanticus W. Tattersall, 1937
      |  |-- P. boucheti Casanova, 1993
      |  |-- P. foresti Bacescu, 1981
      |  |-- P. glaber Hansen, 1910
      |  |-- P. indicus Pillai, 1973
      |  |-- P. intermedius Coifmann, 1937
      |  |-- P. macrops Colosi, 1934
      |  |-- P. microps Colosi, 1930
      |  |-- P. philippinensis Bacescu, 1981
      |  `-- P. sanzoi Colosi, 1930
      `-- Pseudochalaraspidum hanseni Birstein & Tchindonova, 1962

Reference(s):