Skin is dorsally rugose and scattered with blunt, rounded warts that are tipped with one or more keratinized spinules.

[2] Melanophryniscus krauczuki occurs in wet tropical grasslands with rocky soils and in scattered forests at elevations of 125–165 m (410–541 ft) above sea level.

Breeding is explosive and takes place in small, shallow, temporary streams running over basaltic beds.

[1] This species is abundant during breeding events, albeit somewhat difficult to spot because of its cryptic coloration.

It occurs in Fachinal Provincial Park and Puerto San Juan Private Reserve (Argentina).