Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Order Primates Linnaeus, 1758 - primates
       Suborder Strepsirrhini Geoffroy Saint-Hilaire, 1812
         Infraorder Lorisiformes Gregory, 1915
           Family Galagidae Gray, 1825, orth. cons.
             Genus Otolemur Coquerel, 1859 - greater bush babies
               Otolemur crassicaudatus (É. Geoffroy Saint-Hilaire, 1812)
                 1 [Otolemur crassicaudatus crassicaudatus]ᵀ (É. Geoffroy Saint-Hilaire, 1812)
                 2 Otolemur crassicaudatus kirkii (Gray, 1865)