Theropoda Marsh 1881 [Gauthier 1986] see Clade Theropoda Marsh 1881 [Naish, Cau, Holtz Jr., Fabbri & Gauthier 2020]
   Neotheropoda Bakker 1986 [Sereno 1998]
     Averostra Paul 2002
       Tetanurae Gauthier 1986
         Orionides Carrano, Benson & Sampson 2012
           Avetheropoda Paul 1988 [Padian et al. 1999]
             †Allosauroidea Marsh, 1878
               †Allosauria Paul 1988 [Hendrickx, Hartman & Mateus 2015]
                 †Allosauridae Marsh, 1878
                   Genus †Allosaurus Marsh, 1877
                     †Allosaurus fragilis Marsh, 1877