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
           †Megalosauroidea Fitzinger, 1843
             †Megalosauria Bonaparte 1850 [Allain et al. 2012]
               †Spinosauridae Stromer, 1915
                 †Spinosaurinae Stromer, 1915
                   Genus †Irritator Martill, Cruickshank, Frey, Small & Clarke, 1996
                     1 †Irritator challengeri Martill, Cruickshank, Frey, Small & Clarke, 1996