Class Maxillopoda Dahl, 1956 see Subphylum Pancrustacea Zrzavý et al., 1997
Count: †1o;3f;8g;4s
   Subclass †Halicyna Gall & Grauvogel, 1967 see Subclass Branchiura Thorell, 1864
  Count: [†g] †1o;3f;8g;4s
     Order †Cycloidea Schram, Vonk & Hof, 1997 - cycloids see Order Cyclida Schram, Vonk & Hof, 1997, nom. corr.
    Count: [†g] †3f;8g;4s
       Family †Cyclidae Packard, 1885
      Count: [†g] †4g;4s
         Genus †Apionicon Schram, Vonk & Hof, 1997
        Count: [†*] †1s
           1 †Apionicon apioides Schram, Vonk & Hof, 1997
          Count: -