Nephelomys pirrensis
Oryzomys pirrensis Goldman, 1913 [Nephelomys] pirrensis: Weksler, Percequillo, and Voss, 2006 Nephelomys pirrensis, also known as the Mount Pirre rice rat,[1] is a species of rodent in the genus Nephelomys of family Cricetidae.The color of the upperparts is brown and becomes lighter towards the sides.The nose, ears, and forefeet are blackish and the thinly haired hindfeet are dark brown.[4] It is similar in size to N. devius, which occurs further west in Costa Rica, but is somewhat darker and has smaller auditory bullae.[1] On Mount Tacarcuna, it occurs together with the much more common Isthmomys pirrensis, which is similar in appearance, but has longer ears and a hairier tail.