Antarctica comprise only pre-Pleistocene endemic Prostigmata and Cryptostigmata of which
the Prostigmata are the probable earlier colonists. The inland acarofauna of Continental
Antarctica has a different origin from that of Maritime Antarctica, though both are the relict
descendants of a Mesozoic acarofauna, which has been radically depleted by one or more
Mesozoic and/or Cenozoic glacial events.