Cherax nucifraga, a new species of freshwater crayfish (Crustacea: Decapoda: Parastacidae) from the Northern Territory, Australia

A new species of freshwater crayfish, Clierax nucifraga, from the Northern Territory, Australia, is described and illustrated.The species most closely resembles C. harretti Clark, and has affinities with the "quadricarinatus" species-group, characterised by an uncalcified patch on the propodus of the first chelipeds in large males.