I describe a new species of small microhylid frog from the southern versant of New Guinea that is characterized by its long and narrow proboscis, relatively large size and long legs, narrow discs on all fingers, hidden tympanum, and details of color pattern. This represents the twelfth species of long-snouted Choerophryne known and the third from the southern versant of the island's Central Dividing Range. It is only known from a single specimen, so phylogenetic and biogeographic relationships remain unassessed.