Males measure 16–19 mm (0.63–0.75 in) and females 17 mm (0.67 in) in snout–vent length (based on only four and two specimens, respectively). It differs from related Ecuadorian species by not having webbing between its toes and by lack of oblique lateral stripe (sometimes a short stripe is present) and a pale dorsolateral stripe. Male call is a single, sharp "peep".
