Class Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
   Subclass Branchiura Thorell, 1864 - fish lice
     Order †Cyclida Schram, Vonk & Hof, 1997, nom. corr.
       Genus †Oonocarcinus Gemmellaro, 1890
         1 †Oonocarcinus insignis Gemmellaro, 1890
         2 †Oonocarcinus geinitzi Gemmellaro, 1890
         3 †Oonocarcinus anceps Gemmellaro, 1890