Regions of taxonomic disjunction in Australian Odonata and other freshwater insects

The montane chain of eastern Australia includes at least four regions where ecological and physiographic boundaries coincide with taxonomic discontinuities in Odonata, Plecoptera and Megaloptera: the gap between the Paluma Range and Hungella (Queensland); the Carnarvon Gorge (Queensland); the southern margin of the northern tablelands of New South Wales; and the northern limit of the southern highlands, near Canberra. The taxonomic disjunctions are, in most cases, at or below the level of closely related species-pairs, and are probably the outcomes of pleistocene climatic fluctuations.