Systematic studies on the Phreatoicoidea (order isopoda) with a discussion on the phylogeny and zoogeography of other freshwater malacostracan crustaceans from Australia and Tasmania

The taxonomy of the Phreatoicoidea, a group of freshwater isopods from India, South Africa, New Zealand, Australia and Tasmania, is revised. Previously, 22 genera and 8 subfamilies were classified within 4 families. Twenty-four genera are now recognised, and these are allocated into 7 families. Some changes proposed to Nicholls' (1942, 1943) family, subfamily and generic classification are inlcuded.