This species is known from the Rio Grande do Sul, Brazil, and central districts of Misiones Province, Argentina, from 300-1,200m asl.
Habitat and Ecology
It inhabits Araucaria forests in mountainous regions, and breeds in small streams. Outside the breeding season it occurs in leaf-litter. The eggs may be deposited under stones on streambeds.
It has never been recorded as being abundant, and one population in Sao Francisco de Paula has disappeared.
A major threat to this species is habitat loss due to deforestation, for smallholder livestock ranching, and the establishment of pine plantations. It is also threatened by pollution of soil and water due to agricultural practices and industrial pollution with organic wastes.
This species' range overlaps with several protected areas.
Red List Status
Near Threatened (NT)
Listed as Near Threatened because its Extent of Occurrence is not much greater than 20,000 km2, and the extent and quality of its habitat are declining, thus making the species close to qualifying for Vulnerable.
Proceratophrys palustris is similar to this species.
Débora Silvano, Axel Kwet, Paulo Garcia, Julian Faivovich 2004. Proceratophrys bigibbosa. The IUCN Red List of Threatened Species 2004: e.T57295A11604080. http://dx.doi.org/10.2305/IUCN.UK.2004.RLTS.T57295A11604080.en .Downloaded on 22 January 2019