Big-eared opossum

The big-eared opossum ("Didelphis aurita") also known as a saruê is an opossum species from South America. It is found in Argentina, Brazil and Paraguay.
This species, which was considered a population of the common opossum ("D. marsupialis") for some time, was originally described as "D. azarae" by Coenraad Jacob Temminck in 1824, but this name was incorrectly given to the white-eared opossum ("D. albiventris") for over 160 years. As such, the name "azarae" has been abandoned.