Pristimantis vilarsi is known from Brazil (only from the Purus river), Colombia (between the river Guaviare and Caquetá), northern Peru (one record in Loretoyacu, in the department of Loreto) and from southern Venezuela.
In Venezuela it is distributed through all known lowland rainforest south of the Orinoco river, except for the extreme eastern ones (e.g. Imataca) (Barrio-Amorós and Molina, 2006).
It has been recorded from 100-1230 masl.
Habitat and Ecology
This species is found in the leaf-litter of lowland tropical rainforest. It is easily found at night, on low plants, leaves, rocks, mossy walls, and on the ground, near or far from streams. During the day it can be found on leaf litter. Calling males have been seen on rainy nights in May 2005 at Tobogán de la Selva, Puerto Ayacucho, Amazonas state, Venezuela (Barrio-Amorós and Molina, 2006).
It is a direct developing species, although the egg deposition site is not known. It is apparently able to adapt to some disturbance of its habitat.
It is a common species.
There are no known threats to this species at present.
Its range includes several protected areas.
The species has recently been assigned to the genus Pristimantis following Heinicke et al. (2007) (Frost, 2007). It was redescribed by Barrio-Amorós and Molina (2006) based on morphological features and colour patterns of additional specimens.
Cesar Barrio-Amorós 2008. Pristimantis vilarsi. In: IUCN 2014