Alsodes is a genus of alsodid frogs found in Chile and Argentina.

[1] It is the most species-rich frog genus in Patagonia.

[2] Common name spiny-chest frogs has been coined for them.

[3] Characteristic for this genus is that during the reproductive season, adult males have thorny structures on the fingers and rounded spiny patches on the chest.

[4] Breeding takes place in high-elevation streams, and tadpoles have slow development, including overwintering under ice cover.