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
     Arthropoda Siebold, 1848 - arthropods see Phylum Arthropoda Siebold, 1848
       Mandibulata see Subphylum Mandibulata Snodgrass, 1938
         "Crustacea" Brünnich, 1772 see [unranked] Crustaceomorpha Chernyshev, 1960
           1.1 Ichthyostraca Zrzavý et al., 1997
           1.2 Ostracoda Latreille, 1806 see Class Ostracoda Latreille, 1802
           2 Tetraconata see [unranked] Pancrustacea Zrzavý et al., 1997
           2.1 Branchiopoda Latreille, in Cuvier, 1817 see Class Branchiopoda Latreille, 1817
           2.2.1 Copepoda see Subclass Copepoda H. Milne-Edwards, 1840
           2.2.2.1 Thecostraca see Subclass Thecostraca Gruvel, 1905
           2.2.2.2 Malacostraca Latreille 1802 see Class Malacostraca Latreille, 1802
           2.3.1 Remipedia see Class Remipedia Yager, 1981
           2.3.2.1 Genus †Yicaris X. Zhang et al., 2007
           2.3.2.2 Cephalocarida H.L. Sanders, 1955 see Class Cephalocarida H.L. Sanders, 1955