Ornithopoda

Reconstruction of Hypsilophodon, copyright Arthur Weasley.

Belongs within: Genasauria.
Contains: Iguanodontia.

The Ornithopoda is a clade of bipedal and facultatively quadrupedal herbivorous dinosaurs that has been defined as including all taxa closer to Edmontosaurus than to Triceratops (Norman et al. 2004). The composition of this clade is currently subject to revision; recent phylogenetic analyses have found that several taxa previously regarded as basal Ornithopoda should be placed outside the Ornithopoda + Marginocephalia clade. One of the best known basal ornithopods is Hypsilophodon foxii from the Early Cretaceous of England, a lightly built bipedal form less than two metres in length.

<==Ornithopoda [Euornithopoda, Hypsilophodontidae]
    |--Orodromeus Horner & Weishampel 1988NS04
    |    `--O. makelai Horner & Weishampel 1988NS04
    `--+--IguanodontiaCPN07
       `--+--+--Zephyrosaurus Sues 1980NS04
          |  |    `--Z. schaffi Sues 1980NS04
          |  `--Hypsilophodon Huxley 1869CPN07, NS04
          |       |--H. foxii Huxley 1869NS04 [=Iguanodon foxiiN85]
          |       `--H. wielandi Galton & Jensen 1979 (n. d.)NS04
          `--+--Parksosaurus Sternberg 1937NS04
             |    `--P. warreni (Parks 1926) [=Thescelosaurus warreni]NS04
             |--Thescelosaurus Gilmore 1913CPN07, NS04
             |    `--T. neglectus Gilmore 1913 [incl. T. edmontonensis Sternberg 1940]NS04
             `--Bugenasaura Galton 1995NS04
                  `--B. infernalis Galton 1995NS04 [incl. Thescelosaurus garbanii Morris 1976NS04, Stygimoloch garbaniiS03]
Ornithopoda incertae sedis:
  Othnielia Galton 1977NS04
    `--O. rex (Marsh 1877) [=Nanosaurus rex; incl. Laosaurus consors Marsh 1894, L. gracilis Marsh 1878]NS04
  Drinker Bakker, Galton et al. 1990NS04
    `--D. nisti Bakker, Galton et al. 1990NS04
  Leaellynasaura Rich & Rich 1989NS04
    `--L. amicagraphica Rich & Rich 1989NS04
  Fulgurotherium Huene 1932NS04
    `--F. australe Huene 1932NS04
  Oryctodromeus Varricchio, Martin & Katsura 2007D07
    `--O. cubicularisD07
  Jeholosaurus Xu, Wang & You 2000NS04
    `--J. shangyuanensis Xu, Wang & You 2000NS04
  Notohypsilophodon Martínez 1998CPN07, NS04
    `--N. comodorensis Martínez 1998NS04
  Changchunsaurus parvusP10
  Qantassaurus Rich & Vickers-Rich 1999P10, NS04
    `--Q. intrepidus Rich & Vickers-Rich 1999NS04

*Type species of generic name indicated

References

[CPN07] Calvo, J. O., J. D. Porfiri & F. E. Novas. 2007. Discovery of a new ornithopod dinosaur from the Portezuelo Formation (Upper Cretaceous), Neuquén, Patagonia, Argentina. Arquivos do Museu Nacional, Rio de Janeiro 65 (4): 471–483.

[D07] Dixon, D. 2007. The Complete Illustrated Encyclopedia of Dinosaurs & Prehistoric Creatures. Hermes House: London.

[N85] Norman, D. 1985. The Illustrated Encyclopedia of Dinosaurs. Salamander Books: London.

[NS04] Norman, D. B., H.-D. Sues, L. M. Witmer & R. A. Coria. 2004. Basal Ornithopoda. In: Weishampel, D. B., P. Dodson & H. Osmólska (eds) The Dinosauria 2nd ed. pp. 393–412. University of California Press: Berkeley.

[P10] Paul, G. S. 2010. Dinosaurs: A Field Guide. A & C Black.

[S03] Sullivan, R. M. 2003. Revision of the dinosaur Stegoceras Lambe (Ornithischia, Pachycephalosauridae). Journal of Vertebrate Paleontology 23 (1): 181–207.

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