This species has a fragmented distribution, and is found in Lavalleja, Maldonado, Rocha, Florida and Ribera Departments in Uruguay. It occurs below 500m asl, but its exact altitudinal range is unknown.
Habitat and Ecology
It lives in grasslands and rocky outcrops and reproduces in small streams. It probably does not tolerate much habitat disturbance.
It is commonly found during reproductive bouts and has a population that appears to be stable at present.
Exotic tree plantations are a threat to this species.
It does not occur in any protected areas.
Esteban Lavilla, Jose Langone 2004. Melanophryniscus sanmartini. In: IUCN 2014