Class [Mammalia] Linnaeus, 1758 - mammals
   Order Primates Linnaeus, 1758 - primates
     Family Indriidae Burnett, 1828, orth. cons. - avahi, sifakas, and indri
       Genus Propithecus Bennett, 1832 - sifakas
         1 Propithecus diadema Bennett, 1832 - diadem sifaka
         2 Propithecus tattersalli Simons, 1988
         3 Propithecus verreauxi A. Grandidier, 1867 - Verreaux's sifaka