Crustacea Brünnich, 1772 see [unranked] Crustaceomorpha Chernyshev, 1960
   Labrophora Siveter, Waloszek & Williams
     Eucrustacea Kingsley, 1894
       Entomostraca O.F. Müller, 1785
         Maxillopoda Dahl, 1956 see [unranked] Crustaceomorpha Chernyshev, 1960
           1 "copepodan lineage" see [unranked] Crustaceomorpha Chernyshev, 1960
           2 "thecostracan lineage"
           3 Branchiura Thorell, 1864 see Subclass Branchiura Thorell, 1864
           4 Ostracoda Latreille, 1806 see Class Ostracoda Latreille, 1802