Suborder Akentrogonida Häfele, 1911 see Order Akentrogonida Häfele, 1911
   Family Duplorbidae J.T. Høeg & A.V. Rybakov, 1992
     1 Genus Duplorbis Smith, 1906
     2 Genus Cryptogaster Bocquet-Védrine & Bourdon, 1984
     3 Genus Arcturosaccus Rybakov & Høeg, 1992