life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   crustaceomorphs see [unranked] Crustaceomorpha Chernyshev, 1960
     Eucrustacea Kingsley, 1894
       1 Cephalocarida H.L. Sanders, 1955 see Class Cephalocarida H.L. Sanders, 1955
       2.1 Remipedia see Class Remipedia Yager, 1981
       2.2.1.1 Malacostraca Latreille 1802 see Class Malacostraca Latreille, 1802
       2.2.1.2 Leptostraca see Order Leptostraca Claus, 1880
       2.2.2.1 Copepoda see Subclass Copepoda H. Milne-Edwards, 1840
       2.2.2.2.1 Ostracoda Latreille, 1806 see Class Ostracoda Latreille, 1802
       2.2.2.2.2.1 Ascothoracida see Infraclass Ascothoracida Lacaze-Duthiers, 1880
       2.2.2.2.2.2 Cirripedia - barnacles see Infraclass Cirripedia Burmeister, 1834