Class Mammalia Linnaeus, 1758 - mammals
Subclass Theria Parker & Haswell, 1897
Order Primates Linnaeus, 1758 - primates
Suborder Strepsirrhini Geoffroy Saint-Hilaire, 1812
Infraorder Lemuriformes Gregory, 1915
Superfamily Lemuroidea Gray, 1821
Family Indriidae Burnett, 1828, orth. cons. - avahi, sifakas, and indri
Genus Avahi Jourdan, 1834 - avahi, woolly lemur
Avahi occidentalis von Lorenz-Liburnau, 1898