Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Passerimorphae Sibley et al., 1988
           Order Passeriformes Linnaeus, 1758
             Suborder Tyranni - suboscines
               Infraorder Tyrannides Sibley et al., 1988
                 Parvorder Furnariida
                   Superfamily Formicarioidea
                     Family Rhinocryptidae Wetmore, 1930 - tapaculos
                       Genus Scytalopus Gould, 1837
                         Scytalopus femoralis (Tschudi, 1844) - rufous-vented tapaculo
                           1 Scytalopus femoralis sanctaemartae Chapman, 1915 - Santa Marta tapaculo see Scytalopus sanctaemartae Chapman, 1915
                           2 Scytalopus femoralis atratus Hellmayr, 1922 - northern white-crowned tapaculo see Scytalopus atratus Hellmayr, 1922
                           3 Scytalopus femoralis femoralisᵀ (Tschudi, 1844) - rufous-vented tapaculo see Scytalopus femoralis (Tschudi, 1844)
                           4 Scytalopus femoralis bolivianus Allen, 1889 - southern white-crowned tapaculo see Scytalopus bolivianus J.A. Allen, 1889