Order Primates Linnaeus, 1758 - primates
   Semiorder Strepsirrhini see Suborder Strepsirrhini Geoffroy Saint-Hilaire, 1812
     Suborder Strepsirrhini Geoffroy Saint-Hilaire, 1812
       Infraorder Lemuriformes Gregory, 1915
         Superfamily Lemuroidae orth. inval. see Superfamily Lemuroidea Gray, 1821
           Family Indriidae Burnett, 1828, orth. cons. - avahi, sifakas, and indri
             Subfamily Indriinae Burnett, 1828, orth. cons. see Family Indriidae Burnett, 1828, orth. cons.
               Genus Propithecus Bennett, 1832 - sifakas