Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
       Subfamily Hesperomyinae Murray, 1866 - New-World mice and rats see Subfamily Sigmodontinae Wagner, 1843
         Genus Neusticomys Anthony, 1921 - fish-eating rats
           1 Neusticomys monticolus Anthony, 1921 - fish-eating mouse
           2 Neusticomys oyapocki Dubost & Petter, 1978
           3 Neusticomys peruviensis Musser & Gardner, 1974 - Peruvian fish-eating rat
           4 Neusticomys venezuelae (Anthony, 1929) - Venezuelan fish-eating rat