Crustacea Brünnich, 1772 see [unranked] Crustaceomorpha Chernyshev, 1960
   Labrophora Siveter, Waloszek & Williams
     Eucrustacea Kingsley, 1894
       Entomostraca O.F. Müller, 1785
         1 Cephalocarida H.L. Sanders, 1955 see Class Cephalocarida H.L. Sanders, 1955
         2.1 Branchiopoda Latreille, in Cuvier, 1817 see Class Branchiopoda Latreille, 1817
         2.2 Maxillopoda Dahl, 1956 see [unranked] Crustaceomorpha Chernyshev, 1960