Harpacochampsa camfieldensis gen. et sp. nov. from 1he mid-Miocene Camfield Beds of northern Australia is the first slender-snouted extinct crocodile known from the Australian continent. It is founded on the anterior portion of the snout, posterolateral portion of the cranium and an anterior dentary fragment. Harpacochampsa camfieldensis is distinctive in having highly size differentiated premaxillae teeth and isodont maxillary teeth. The largest rostral teeth are found on the premaxillae, as in Gavialis gangeticus. The relative size and internal morphology of the supratemporal fenestra, and jugal morphology at the level of the infratemporal fenestra, also resemble those of the gavial. The arrangemenl of the cranial bones differs from that in Gavialis, corresponding most closely with extant Crocodylus species. Some features present on Harpacochampsa camfieldensis have previously been considered diagnostic of gavial ids, but are here interpreted to be convergently evolved as part of a functional adaptation. Harpacoclwmpsa camfieldensis is shown to be a crocodylid, but its affinities with in the group cannot be determined because of incomplete preservation.