The fingers are short, broad at the base but tapering to narrow, rounded tips.

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.

[2] Barygenys nana is known from a number of high-altitude localities, presumably representing montane rainforests and forest/grassland mosaics, at 1,800–3,500 m (5,900–11,500 ft) above sea level.