The ‘lilliputian frog’ (Noblella sp. nov.) measures approximately 10 mm in length (about half the width of a dime), which may make it the smallest amphibian in the Andes, and among the smallest in the world. Due to their tiny size and habit of living in tunnels beneath the thick layers of moss and humus in the cloud forest, they were difficult to find even by tracking their frequent calls.

Noblella is a genus of frogs in the family Craugastoridae. They are found on the eastern slopes of the Andes and in the Amazon Basin in Colombia, Ecuador, Peru, Bolivia, and western Brazil.