Crossodactylus grandis, or the Bahia spinythumb frog, is a species of frog in the family Hylodidae.

Its natural habitats are subtropical or tropical high-altitude grassland and rivers.

It is known solely from the Parque Nacional do Itatiaia in Minas Gerais in Brazil, where it lives in cloud forests.

[2][3] It is threatened by habitat loss.

This Hyloidea-related article is a stub.