Class [Mammalia] Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Family Muridae Batsch, 1788 - rats, mice, hamsters, voles, lemmings, and gerbils
       Subfamily Murinae Batsch, 1788 - Old World mice and rats
         Genus Arvicanthis Lesson, 1842 - unstriped grass mice
           1 Arvicanthis abyssinicus (Rueppell, 1842)
           2 Arvicanthis blicki Frick, 1914
           3 Arvicanthis dembeensis see Arvicanthis niloticus dembeensis
           4 Arvicanthis niloticus (Desmarest, 1822)
           5 Arvicanthis somalicus see Arvicanthis neumanni (Matschie, 1894)