The illustration above is a John Gould painting of Hydromys, taken from here.    From Wordnik.com.  [Archive 2006-03-01] Reference

Water rats (Hydromys chrysogaster), eastern swamp rat (Rattus lutreolus), long-necked tortoise (Chelodina longicollis) and short-necked or Murray tortoise (Emydura macquarri) are found here as well.    From Wordnik.com.  [Naracoorte woodlands] Reference

Australasia has an assemblage of amphibious murids that includes Hydromys (the beaver rats) and Crossomys (the earless water rat), plus a number of genera where experts disagree as to whether the animals are actually amphibious or not.    From Wordnik.com.  [Archive 2006-03-01] Reference

What makes the African taxa special is that, not only have they so far failed to become as well adapted for amphibious life as have murids elsewhere (like the ichthyomyines, or Hydromys or Crossomys), but they might also be doing something that murids elsewhere are not.    From Wordnik.com.  [Archive 2006-03-01] Reference

Macropus, Halmaturus, Hypsiprymnus, and Hydromys, appear to be common to all parts of the continent, and also to Van Diemen's Land.    From Wordnik.com.  [Journals of Two Expeditions of Discovery in North-West and Western Australia, Volume 2] Reference

Several species are listed as threatened (VU or higher) by IUCN: New Guinea pademelon (Thylogale brownii), Gilliard's flying-fox (Pteropus gilliardorum), large-eared sheathtail-bat (Emballonura dianae), Bismarck trumpet-eared bat (Kerivoula myrella), New Britain water-rat (Hydromys neobrittanicus).    From Wordnik.com.  [New Britain-New Ireland montane rain forests] Reference

Several species are listed as threatened (VU or higher) by IUCN: New Guinea pademelon (Thylogale brownii), Gilliard's flying-fox (Pteropus gilliardorum), large-eared sheathtail-bat (Emballonura dianae), Bismarck trumpet-eared bat (Kerivoula myrella), and New Britain water-rat (Hydromys neobrittanicus).    From Wordnik.com.  [New Britain-New Ireland lowland rain forests] Reference

Hydromys shawmayeri.    From Wordnik.com.  [Southeastern Papuan rain forests] Reference

Hydromys chrysogaster.    From Wordnik.com.  [Journals of Two Expeditions of Discovery in North-West and Western Australia, Volume 2] Reference

Hydromys chrysogaster Geoff.    From Wordnik.com.  [Journals of Two Expeditions of Discovery in North-West and Western Australia, Volume 2] Reference