A new species of insular treefrog in the Litoria thesaurensis species group from the Nakanai Mountains, New Britain, Papua New Guinea

The Islands of East Melanesia have a unique and highly endemic frog fauna derived entirely from overseas colonisation events. Within New Britain is notable centre diversity endemism, with at least 15 species, mostly in the ceratobatrachid genus Cornufer . Here we describe first pelodryadid treefrog Britain. new species member Litoria thesaurensis group but can be distinguished near relatives by aspects body size, webbing extent, bone pigmentation male advertisement call. two known specimens were collected Hill Forest on karst basement Nakanai Mountains provides evidence diversification insular PelodrydidaePelodrydidae, reinforces Britain, especially predominantly mountains, as hotspot Melanesia. In light high rates forest loss conversion also region significant conservation concern.