The Gulf Plains, an interim Australian bioregion (IBRA), is located in the Northern Territory and Queensland, comprising 22,041,825 hectares (54,466,540 acres).[1] It is one of 89 such bioregions defined in Australia, with 419 subregions as of IBRA version 7, compared with the 85 bioregions and 403 subregions described in IBRA6.1.[2][3]
Thackway, R and I D Cresswell (1995) An interim biogeographic regionalisation for Australia : a framework for setting priorities in the National Reserves System Cooperative Program Version 4.0 Canberra : Australian Nature Conservation Agency, Reserve Systems Unit, 1995. ISBN0-642-21371-2