Yonenaga's Atlantic spiny-rat, Trinomys yonenagae, is a spiny rat species found in the rainforests of South America. Locally, it is known as rabo de facho. The Yonenaga's rat is a burrowing rodent that lives in colonies. As they live in an environment where vision is limited, they rely on scents from anal glands to provide cues as to identity and intention of other rodents in the colony.