Guayasamín, JuanArteaga, Alejandro2022-07-042022-07-042013https://www.biotaxa.org/Zootaxa/article/view/zootaxa.3616.4.3https://hdl.handle.net/20.500.14809/3608We describe a new Pristimantis from La Libertad and Rumiloma, Reserva Mazar, Andes of Southeastern Ecuador, at elevations between 2895-3415 m. This species is assigned to the P. orestes group, from whose members it differs by its small body size (adult males = 18.1 mm; adult females = 23.7 mm), usually reticulated ventral pattern, and visible tympanum. The vocalization of the new species consists of a series of calls; each call is composed by a pulsed, nonmodulated note in frequency, and with a dominant frequency of 3122-3171 Hz. A molecular phylogeny based on a fragment of the mitochondrial gene 12S shows that the new species is sister to Pristimantis simonbolivari. © 2013 Magnolia Press.engopenAccesshttps://creativecommons.org/licenses/by/4.0/article