Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Eoaves Sibley et al., 1988 see Cohort Palaeognathae Pycraft, 1900
       Parvclass Ratitae (Merrem, 1813) see Subcohort Ratitae Merrem, 1813
         Order Struthioniformes Latham, 1790
           Suborder Casuarii see Order Casuariiformes Sclater, 1880
             Family Casuariidae Kaup, 1847 - cassowaries
               Tribe Casuariini - cassowaries see Family Casuariidae Kaup, 1847
                 Genus Casuarius Brisson, 1760
                   1 Casuarius casuarius (Linnaeus, 1758) - southern cassowary
                   2 Casuarius bennetti Gould, 1858 - dwarf cassowary
                   3 Casuarius unappendiculatus Blyth, 1860 - northern cassowary