It is found in the Misiones Province in the northeastern Argentina and in Rio Grande do Sul and Santa Catarina in southern Brazil; its range might extend into the adjacent Paraguay.

The canthus rostralis is demarcated by a prominent curved tubercular ridge.

The upper eyelids are connected by a narrow, curved, whitish or tan stripe.

[3] Proceratophrys bigibbosa occurs in Araucaria forests in mountainous regions at 300–1,200 m (980–3,940 ft) above sea level.

It is threatened by habitat loss caused by deforestation for smallholder livestock ranching, and by the establishment of pine plantations.