Pseudozioidea is a superfamily of crabs, formerly treated in the Eriphioidea, Carpilioidea, Xanthoidea, Pilumnoidea and Goneplacoidea. A number of fossils from the Eocene onwards are known from the family Pseudoziidae. Eleven genera are recognised in three families:

• Christmaplacidae Naruse & Ng, 2014
  • Christmaplax Naruse & Ng, 2014
  • Harryplax Mendoza & Ng, 2017
• Pilumnoididae Guinot & Macpherson, 1987
  • Pilumnoides Lucas, 1844
  • Setozius Ng & Ahyong, 2013
• Planopilumnidae Serène, 1984
  • Flindersoplax Davie, 1989
  • Haemocinus Ng, 2003
  • Planopilumnus Balss, 1933
  • Platychelonion Crosnier & Guinot, 1969
  • Rathbunaria Ward, 1933
• Pseudoziidae Alcock, 1898
  • Archaeozius † Schweitzer, 2003
  • Euryozius Miers, 1886
  • Flindersoplax Davie, 1989
  • Priabonocarcinus † Müller & Collins, 1991
  • Pseudozius Dana, 1851
  • Santeexanthus † Blow & Manning, 1996
  • Tongapapaka † Feldmann, Schweitzer & McLaughlin, 2006

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