Hatt's vesper rat

Hatt's vesper rat
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Family: Cricetidae
Genus: Otonyctomys
Anthony, 1932
Species:
O. hatti
Binomial name
Otonyctomys hatti
Anthony, 1932

Hatt's vesper rat (Otonyctomys hatti), also known as Hatt's vesper mouse or Yucatán vesper rat, is a species of rodent in the family Cricetidae. It is the only species in the genus Otonyctomys. It is named for its discoverer, Robert T. Hatt.