Atelopus tumifrons Boulenger, 1905 Melanophryniscus tumifrons is a species of toad in the family Bufonidae.

It is endemic to Brazil.

Its natural habitats are subtropical or tropical moist lowland forests, moist savanna, subtropical or tropical seasonally wet or flooded lowland grassland, intermittent freshwater marshes, pastureland, and heavily degraded former forest.

It is threatened by habitat loss.

This Bufonidae article is a stub.