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 Passeri see Suborder Passeres (C. Linnaeus, 1758) C. Linnaeus, 1766
               Parvorder Passerida (C. Linnaeus, 1758) Sibley et al., 1988
                 Superfamily Sylvioidea
                   Family Sylviidae Leach, 1820 - Old World warblers
                     Subfamily Acrocephalinae Salvin, 1882
                       Genus Orthotomus Horsfield, 1821
                         01 Orthotomus metopias (Reichenow, 1907) see Artisornis metopias (Reichenow, 1907)
                         02 Orthotomus moreaui (Sclater, 1931) see Artisornis moreaui (W.L. Sclater, 1931)
                         03 Orthotomus cuculatus Temminck, 1836, orth. oblit. see Orthotomus cucullatus Temminck, 1836, nom. emend., orth. protect.
                         04 Orthotomus heterolaemus (Mearns, 1905) see Orthotomus cucullatus heterolaemus
                         05 Orthotomus sutorius (Pennant, 1769)
                         06 Orthotomus atrogularis Temminck, 1836
                         07 Orthotomus castaneiceps Walden, 1872
                         08 Orthotomus frontalis Sharpe, 1877 see Orthotomus castaneiceps frontalis
                         09 Orthotomus derbianus F. Moore, 1855
                         10 Orthotomus sericeus Temminck, 1836
                         11 Orthotomus ruficeps (Lesson, 1830)
                         12 Orthotomus sepium Horsfield, 1821
                         13 Orthotomus samarensis Steere, 1890
                         14 Orthotomus nigriceps Tweeddale, 1878
                         15 Orthotomus cinereiceps Sharpe, 1877