• Thumbnail for Ornithomimosauria
    Arctometatarsalia, as it has a very similar definition. While "Ornithomimiformes" is the newer group, Sereno rejected the idea that Arctometatarsalia...
    29 KB (2,409 words) - 13:09, 13 February 2024
  • Thumbnail for Alvarezsauridae
    the Ornithomimosauria as sister clades within either Thomas Holtz's Arctometatarsalia or Paul Sereno's Ornithomimiformes. The discovery of Haplocheirus...
    22 KB (2,170 words) - 06:45, 24 April 2024
  • Thumbnail for Tyrannosauroidea
    ornithomimosaurs and troodonts into a coelurosaurian clade called Arctometatarsalia based on a common ankle structure where the second and fourth metatarsals...
    70 KB (6,141 words) - 17:27, 9 April 2024
  • cursoriality. Originally, this character was used to define a clade, the Arctometatarsalia, which is now considered polyphyletic. axis The axis is the second...
    158 KB (16,339 words) - 15:38, 13 February 2024
  • two classification systems for theropods. The first is the clade Arctometatarsalia, made up of tyrannosauroids, ornithomimosaurs, and troodontids, because...
    9 KB (800 words) - 22:33, 12 October 2023
  • Thumbnail for Bird ichnology
    ornithopod dinosaurs. Among the former, the Ornithomimiformes (= "Arctometatarsalia" sensu stricto) were convergent to ratites in many respects, including...
    17 KB (1,892 words) - 18:57, 8 January 2024
  • Thumbnail for Timeline of ornithomimosaur research
    same as that of a clade proposed in 1996 by Thom Holtz called the Arctometatarsalia. Padian and the others proposed a new redefinition of Ornithomimosauria...
    42 KB (3,568 words) - 09:28, 14 February 2024