Paedophryne amauensis is a species of new species of microhylid from Papua New Guinea discovered in August 2009 and formally described in January 2012. At 7.7 mm (0.30 in) in length, it is the world's smallest known vertebrate. The newly described frog species was listed in the Top 10 New Species 2013 by the International Institute for Species Exploration for discoveries made during 2012. The list was announced on May 22 2013.