Dinosauria Owen 1841 [Padian & May 1993], nom. cl. inval. see Clade Dinosauria Owen 1842 [Langer, Novas, Bittencourt, Ezcurra & Gauthier 2020]
Count: [†*] †2f;19g;11s
   Theropoda Marsh 1881 [Gauthier 1986] see Clade Theropoda Marsh 1881 [Naish, Cau, Holtz Jr., Fabbri & Gauthier 2020]
  Count: [†*] †2f;19g;11s
     Coelurosauria Huene 1914 [Gauthier 1986]
    Count: [†*] †2f;19g;11s
       †Alvarezsauria Bonaparte 1991
      Count: [†*] †1f;14g;9s
         †Alvarezsauridae Bonaparte 1991 [Sereno 1999] see Family Alvarezsauridae Bonaparte, 1991
        Count: [†*] †12g;7s
           †Patagonykinae Agnolin, Powell, Novas & Kundrát 2011 see Subfamily Patagonykinae Agnolin et al., 2012
          Count: [†*] †3g;3s [4 Mar 2019]
             ?Genus †Achillesaurus Martinelli & Vera, 2007 [monotypic]
            Count: [†*] †1s [5 Mar 2019]
               †Achillesaurus manazzonei Martinelli & Vera, 2007
              Count: -