living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Arthropoda Siebold, 1848 - arthropods
           Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
             Subclass Malacostraca Latreille, 1802 see Class Malacostraca Latreille, 1802
               Superorder Eucarida Calman, 1904
                 Order Decapoda Latreille, 1802 - decapods
                   Suborder Pleocyemata Burkenroad, 1963
                     Infraorder Caridea Dana, 1852 - caridean and procaridean shrimps
                       Superfamily Palaemonoidea Rafinesque, 1815
                         Family Gnathophyllidae Dana, 1852
                           1.1 Genus Hymenocera Latreille, 1819
                           1.2 Genus Phyllognathia Borrodaile, 1915
                           2.1 Genus Gnathophylloides Schmitt, 1933
                           2.2 Genus Levicaris A.J. Bruce, 1973
                           2.3 Genus Pycnocaris Bruce, 1972
                           2.4 Genus Gnathophyllum Desmarest, 1823