Leptodactylus labyrinthicus is a species of frog in the family Leptodactylidae. Its common names are labyrinth frog, pepper frog, South American pepper frog, and pepper foam frog. This frog is found in central and southeastern Brazil, northeast Argentina (Misiones and Corrientes Provinces), and eastern Paraguay. Earlier reports from Bolivia refer to Leptodactylus vastus, or possibly an unnamed species.

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