Lepidosauria Haeckel 1866 [Gauthier, Estes & de Queiroz 1988], nom. cl. inval.
 see Class Lepidosauria Haeckel, 1866
  
 Order Squamata Oppel, 1811
    
 Bifurcata Vidal & Hedges, 2005
      
 Unidentata Vidal & Hedges, 2005
        
 Episquamata Vidal & Hedges, 2005
          
 Toxicofera Vidal & Hedges, 2005
            
 Anguimorpha Fürbringer, 1900
 see Suborder Anguimorpha Fürbringer, 1900
              
 Neoanguimorpha Vidal & Hedges, 2009
                
 Superfamily Anguioidea Gray, 1825
 see Superfamily Anguoidea Gray, 1825
                  
 1 Family Diploglossidae Cope, 1864
                  
 2 Family Anniellidae Cope, 1864 [monotypic] - American legless lizards
                  
 3 Family Anguidae Gray, 1825 - glass lizards and alligator lizards