Kingdom [Animalia] Linnaeus, 1758 - animals
   Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake 1997, nom. cl. inval. - ecdysozoans see Clade Ecdysozoa Aguinaldo, Turbeville, Linford, Rivera, Garey, Raff & Lake 1997 [Lake, Halanych, Servin & Garey 2020]
     Panarthropoda Nielsen, 1995 - panarthropods
       Tritocerebra see [unranked] Tactopoda Budd, 2001
         Phylum Arthropoda Siebold, 1848 - arthropods
           Subphylum Mandibulata Snodgrass, 1938
             Infraphylum Crustaceomorpha Chernyshev, 1960 see [unranked] Crustaceomorpha Chernyshev, 1960
               Superclass Crustacea Pennant, 1777 - crustaceans see [unranked] Crustaceomorpha Chernyshev, 1960
                 Epiclass Eucrustacea Kingsley, 1894 see Subphylum Pancrustacea Zrzavý et al., 1997
                   Class Maxillopoda Dahl, 1956 see Subphylum Pancrustacea Zrzavý et al., 1997
                     Subclass Copepoda H. Milne-Edwards, 1840 - copepods