New to nature No 13: Splendeuptychia ackeryi

Among the 3 million butterfly specimens in the Natural History Museum, London, a new species sat unrecognised for 90 years until curator Blanca Huertas matched it with specimens she had collected in Colombia. Among the distinctive features of the new species, Splendeuptychia ackeryi , is a "moustache" of long hairs on the mouthparts. South America is home to about 40% of the world's 20,000 butterfly species. Quentin Wheeler is director of the International Institute for Species Exploration, Arizona State University