Dinosauria Owen 1841 [Padian & May 1993], nom. cl. inval. see Clade Dinosauria Owen 1842 [Langer, Novas, Bittencourt, Ezcurra & Gauthier 2020]
   Theropoda Marsh 1881 [Gauthier 1986] see Clade Theropoda Marsh 1881 [Naish, Cau, Holtz Jr., Fabbri & Gauthier 2020]
     Coelurosauria Huene 1914 [Gauthier 1986]
       †Alvarezsauria Bonaparte 1991
         †Alvarezsauridae Bonaparte 1991 [Sereno 1999] see Family Alvarezsauridae Bonaparte, 1991
           †Patagonykinae Agnolin, Powell, Novas & Kundrát 2011 see Subfamily Patagonykinae Agnolin et al., 2012
             ?Genus †Achillesaurus Martinelli & Vera, 2007 [monotypic]
               †Achillesaurus manazzonei Martinelli & Vera, 2007