Class Mammalia Linnaeus, 1758 - mammals
   Subclass Theria Parker & Haswell, 1897
     Infraclass Eutheria Gill, 1872
       Cohort Unguiculata Linnaeus, 1766
         Order Primates Linnaeus, 1758 - primates
           Suborder Prosimii Illiger, 1811 see Infraorder Strepsirrhini "Geoffroy Saint-Hilaire, 1812"
             Family Indriidae Burnett, 1828, orth. cons. - avahi, sifakas, and indri