[ Populations in Uruguay were until recently considered a different species (Melanophryniscus orejasmirandai) and assessed as being vulnerable.[2]]Its natural habitats are subtropical or tropical seasonally wet or flooded lowland grassland, intermittent freshwater lakes, and intermittent freshwater marshes. It is threatened by habitat loss.[1]
References
1. ^1 {{Cite journal | author = Garcia, Paulo | author2 = Segalla, Magno Vicente | title = Melanophryniscus pachyrhynus | journal = The IUCN Red List of Threatened Species | volume = 2004 | page = e.T54826A11210690 | publisher = IUCN | date = 2004 | url = http://www.iucnredlist.org/details/54826/0 | doi = 10.2305/IUCN.UK.2004.RLTS.T54826A11210690.en | access-date = 3 January 2018}}
2. ^{{Cite journal | author = Lavilla, Esteban | author2 = Langone, Jose | title = Melanophryniscus orejasmirandai | journal = The IUCN Red List of Threatened Species | volume = 2004 | page = e.T54825A11210496 | publisher = IUCN | date = 2004 | url = http://www.iucnredlist.org/details/54825/0 | doi = 10.2305/IUCN.UK.2004.RLTS.T54825A11210496.en | access-date = 3 January 2018}}