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