Order †Saurischia Seeley, 1887 see Clade Saurischia Seeley 1888 [Gauthier, Langer, Novas, Bittencourt & Ezcurra 2020]
Count: -
   Suborder †Theropoda Marsh, 1881 see Clade Theropoda Marsh 1881 [Naish, Cau, Holtz Jr., Fabbri & Gauthier 2020]
  Count: -
     Infraorder †Coelurosauria Huene, 1914 see Division Coelurosauria Huene, 1914
    Count: [*] †8f15g
       Family †Ornithomimidae Marsh, 1890
      Count: -
         Genus †Dromiceiomimus Russell, 1972 see Genus Ornithomimus Marsh, 1890
        Count: -
         Genus †Elaphrosaurus Janensch, 1920
        Count: -
         Genus †Gallimimus Osmólska, Roniewicz & Barsbold, 1972
        Count: -
         Genus †Ornithomimus Marsh, 1890
        Count: -
         Genus †Struthiomimus Osborn, 1917
        Count: -