Class Maxillopoda Dahl, 1956 see Subphylum Pancrustacea Zrzavý et al., 1997
   Subclass †Halicyna Gall & Grauvogel, 1967 see Subclass Branchiura Thorell, 1864
     Order †Cycloidea Schram, Vonk & Hof, 1997 - cycloids see Order Cyclida Schram, Vonk & Hof, 1997, nom. corr.
       Family †Cyclidae Packard, 1885
         Genus †Cyclus de Koninck, 1841
           †Cyclus obesus Schram, Vonk & Hof, 1997 see Americlus obesus (Schram, Vonk & Hof, 1997)