Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Echimyidae Gray, 1825 - spiny rats
       Genus Mesomys Wagner, 1845
         1 Mesomys didelphoides (Desmarest, 1817)
         2 Mesomys hispidus (Desmarest, 1817)
         3 Mesomys obscurus (Wagner, 1840) see Makalata obscura (Wagner, 1840)
         4 Mesomys stimulax Thomas, 1911