Insuetophrynus is a monotypic genus of frogs in the Rhinodermatidae family. The sole species is Insuetophrynus acarpicus, also known as Barrio's frog. It is endemic to Chile and only known from few localities on the Valdivian Coast Range between Chanchán in the Los Ríos Region in the south and Queule (southernmost Araucanía Region) and Colequal Alto in the north; the fourth locality is Mehuín, which is the type locality. The altitudinal range is 50–486 m (164–1,594 ft) asl.