Nyctomyini

Nyctomyini is a tribe of New World rats and mice in the subfamily Tylomyinae which includes two genera, Nyctomys and Otonyctomys, each with a single species. Both are medium-sized rats with tawny to brownish fur and a hairy tail.

Classification
Tribe Nyctomyini
 * Genus Otonyctomys
 * Hatt's vesper rat, Otonyctomys hatti
 * Genus Nyctomys
 * Sumichrast's vesper rat, Nyctomys sumichrasti