Barygenys nana is a species of frog in the family Microhylidae. It is endemic to New Guinea and is known from the mountains of Eastern Highlands and Western Highlands Provinces, Papua New Guinea. The specific name nana refers to the small size of this species. Common name highland Papua frog has been proposed for it. Description The holotype, a male presumed to be adult, measures in snout–vent length, whereas adult females measure in snout–vent length. The eyes are small, although relatively large compared to other Barygenys species. The snout is pointed. The tympanum is only faintly visible. The fingers are short, broad at the base but tapering to narrow, rounded tips. The toes are unwebbed. Skin is smooth, except in the post-sacral region and the hind legs where it becomes pustulose; the degree of rugosity varies greatly between individuals. Preserved specimens are dorsally light brown with some darker infuscation. The ventral surfaces are light brown with fine, darker mottling. The chin is slightly lighter than the rest of the lower surfaces. Habitat and conservation Barygenys nana is known from a number of high-altitude localities, presumably representing montane rainforests and forest/grassland mosaics, at above sea level. It is considered not to be common. Development is presumably direct (i.e, there is no free-living larval stage). There are no known threats to this species. It is not known to occur in any protected areas. References nana Amphibians of New Guinea Amphibians of Papua New Guinea Endemic fauna of New Guinea Endemic fauna of Papua New Guinea Taxa named by Richard G. Zweifel Amphibians described in 1972 Taxonomy articles created by Polbot