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 Thamnophilida
                   Family Thamnophilidae Swainson, 1824 - antbirds
                     Genus Thamnophilus Vieillot, 1816
                       Thamnophilus caerulescens Vieillot, 1816 - variable antshrike
                         1 Thamnophilus caerulescens melanochrous - mountain antshrike
                         2 Thamnophilus caerulescens aspersiventer Orbigny & Lafresnaye, 1837 - bar-bellied antshrike
                         3 Thamnophilus caerulescens connectens - Bolivian antshrike
                         4 Thamnophilus caerulescens caerulescensᵀ Vieillot, 1816 - variable antshrike
                         5 Thamnophilus caerulescens gilvigaster Pelzeln, 1868 - tawny-bellied antshrike