Class Mammalia Linnaeus, 1758 - mammals
   Order Rodentia Bowdich, 1821 - rodents
     Suborder Sciurognathi (Tullberg, 1899) see Suborder Sciuromorpha Brandt, 1855
       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 nairobae J.A. Allen, 1909
             4 Arvicanthis neumanni (Matschie, 1894)
             5 Arvicanthis niloticus (Desmarest, 1822)