Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Cuculiformes Wagler, 1830 - cuckoos and plantain-eaters
         Family Cuculidae Vigors, 1825 - cuckoos
           Subfamily Cuculinae Vigors, 1825
             Genus Cacomantis S. Müller, 1842
               Cacomantis merulinus (Scopoli, 1786) - plaintive cuckoo
                 1 Cacomantis merulinus querulus Heine, 1863
                 2 Cacomantis merulinus threnodes Cabanis & Heine, 1863
                 3 Cacomantis merulinus lanceolatus (Müller, 1843)
                 4 Cacomantis merulinus merulinus (Scopoli, 1786)