Two new frog species from the Foja Mountains in northwestern New Guinea (Amphibia, Anura, Microhylidae)

Abstract

Two new microhylid frogs in the genera Choerophryne and Oreophryne are described from the Foja Mountains in Papua Province of Indonesia. Both are small species (males 15.9 - 18.5 mm snout-urostyle length [SUL] and 21.3 - 22.9 mm SUL respectively) that call from elevated positions on foliage in primary lower montane rainforest. The new Choerophryne species can be distinguished from all congeners by, among other characters, a unique advertisement call consisting of an unpulsed (or very finely pulsed) peeping note lasting 0.29 - 0.37 seconds. The new Oreophryne species belongs to a group that has a cartilaginous connection between the procoracoid and scapula and rattling advertisement calls. Its advertisement call is a loud rattle lasting 1.2 - 1.5 s with a note repetition rate of 11.3 - 11.7 notes per second.