Clade Lepidosauria Haeckel 1866 [de Queiroz & Gauthier 2020] see Subclass Lepidosauria Duméril & Bibron, 1839
Count: [*†*] 2g;1s; †34g;42s
   Clade Rhynchocephalia Günther 1867 [Gauthier, Estes & de Queiroz 1988] see Order Rhynchocephalia Günther, 1867
  Count: [*†*] 1g;1s; †30g;38s
     Genus †Gephyrosaurus Evans, 1980
    Count: [†*] †1s
       †Gephyrosaurus bridensis Evans, 1980
      Count: -