Superfamily †Cycloidea Packard, 1885 - cycloids see Order Cycloidea Schram, Vonk & Hof, 1997
   Family †Hemitrochiscidae Trauth, 1918
     1 Genus †Hemitrochiscus Schauroth, 1854
     2 Genus †Oonocarcinus Gemmellaro, 1890
     3 Genus †Cyclocarcinus Stolley, 1920, nom. illeg. see Genus Cyclocarcinides Glaessner, 1969