This species is restricted to coastal Uruguay (Montevideo, Canelones, Maldonado, and Rocha Departments) and adjacent Brazil (one locality in Rio Grande do Sul state). It occurs at sea level.
Habitat and Ecology
It is a diurnal species inhabiting coastal sand dunes. It is an explosive breeder, and may be found in large numbers in temporary pools after heavy rains; the larvae develop in these pools. It is not tolerant of habitat disturbance.
This species is in decline in some areas and extirpated in others. Nevertheless, it is still common at several localities.
The major threat to this species is habitat loss due to human settlements, exotic tree plantations, and the drainage of wetlands.
It does not occur in any protected areas, and there is a need for improved protection of sites at which this species is known to occur.
Elevated to full species status by Klappenbach and Langone (1992).
Jose Langone 2004. Melanophryniscus montevidensis. In: IUCN 2014