Crustacea Brünnich, 1772 see [unranked] Crustaceomorpha Chernyshev, 1960
   Labrophora Siveter, Waloszek & Williams
     †Phosphatocopina Müller, 1964 see Order Phosphatocopida Müller, 1964
       †Euphosphatocopina Maas, Waloszek & Müller, 2003 see [unranked] Euphosphatocopida
         †Hesslandonina Müller, 1964 see Suborder Hesslandonina Müller, 1982
           Family †Cyclotronidae Grundel, 1981
             Genus †Cyclotron Rushton, 1969
               †Cyclotron lapworthi (Groom, 1902)