Class Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
   Subclass Branchiura Thorell, 1864 - fish lice
     [†Cycloidea Schram, Vonk & Hof, 1997 - cycloids] see Order Cyclida Schram, Vonk & Hof, 1997, nom. corr.