Crossodactylus is a genus of frogs in the family Hylodidae. The genus occurs in Brazil, southern Paraguay, and northern Argentina. These frogs are sometimes known as Limnocharis, Tarsopterus, Calamobates, and by the common name spinythumb frogs.[1] They typically inhabit streams in mountainous areas in the Atlantic Forest or in montane savanna.
There are 14 species: