Melanophryniscus devincenzii Klappenbach 1968

Female: 24-29 mm, Male: 20-25 mm. Dorsum brown, sometimes with two longitudinal light ocher bands and/or glandular strings. Belly black with a red subtriangular blotch from the thighs to the chest. This toad exhibits a medium-size frontal swelling.

The habitat for this species is in northern Uruguayan hills.

The diet of this toad consists mainly of ants and acari. M. devincenzii is an explosive breeder, with diurnal activity throughout the year. They reproduce after rains. The advertisement call has two components (a very long whistle and a train of vibrations). During amplexus the couple swim under water, and the eggs are deposited in several inmersions (sometimes under rocks). This species exhibits the defensive behavior named "Unkenreflex".

Habitat loss and fragmentation seem to be the main threat for M. devincenzii.

Melanophryniscus devincenzii is a species of toad in the family Bufonidae. It is found in Argentina, Uruguay, possibly Brazil, and possibly Paraguay. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical seasonally wet or flooded lowland grassland, intermittent rivers, rocky areas, and plantations. It is threatened by habitat loss.