Tags: Crustacean.
Phreatoicidea is a suborder of isopod crustaceans. Extant species are confined to freshwater environments in South Africa India and Oceania. This seemingly Gondwana-derived distribution belies the fact that the group once had a cosmopolitan distribution; fossils which can be assigned to the Phreatoicidea are the oldest isopod fossils and are found throughout the world.
