Hadrosauroidea is a clade or superfamily of ornithischian dinosaurs that includes the "duck-billed" dinosaurs, or Hadrosauridae, and all dinosaurs more closely related to them than to Iguanodon. Their remains have been recovered in Asia, Europe, Africa and the Americas. Many primitive hadrosauroids, such as the Asian Probactrosaurus and Altirhinus, have traditionally been included in a paraphyletic (unnatural grouping) "Iguanodontidae". With cladistic analysis, the traditional Iguanodontidae has been largely disbanded, and probably includes only Iguanodon and perhaps its closest relatives.

Hadrosauroids
Temporal range: Early-Late Cretaceous, 130–66 Ma
Probactrosaurus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Ornithischia
Clade: Neornithischia
Clade: Ornithopoda
Clade: Hadrosauriformes
Superfamily: Hadrosauroidea
Cope, 1869
Type species
Hadrosaurus foulkii
Leidy, 1858
Subgroups
Synonyms

Classification

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The cladogram below follows an analysis by Andrew McDonald, 2012, and shows the position of Hadrosauroidea within Styracosterna:[1]

Styracosterna

The cladogram below follows an analysis by Wu Wenhao and Pascal Godefroit (2012):[2]

Cladogram after Prieto-Marquez and Norell (2010):[3]

A phylogenetic analysis performed by Ramírez-Velasco et al. (2012) found a large polytomy between all hadrosauroids that are more derived than Probactrosaurus but less derived than Hadrosauridae. The exclusion of Claosaurus, Jeyawati, Levnesovia, Nanyangosaurus, Shuangmiaosaurus and Telmatosaurus from the analysis resulted in a more resolved topology:[4]

See also

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References

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  1. ^ McDonald, A. T. (2012). "Phylogeny of basal iguanodonts (Dinosauria: Ornithischia): an update". PLOS ONE. 7 (5): e36745. doi:10.1371/journal.pone.0036745. PMC 3358318. PMID 22629328.
  2. ^ Wu Wenhao & Pascal Godefroit (2012). "Anatomy and relationships of Bolong yixianensis, an Early Cretaceous iguanodontoid dinosaur from western Liaoning, China". In Godefroit, P. (ed.). Bernissart Dinosaurs and Early Cretaceous Terrestrial Ecosystems. Indiana University Press. pp. 293–333.
  3. ^ Albert Prieto-Marquez & Mark A. Norell (2010). "Anatomy and relationships of Gilmoreosaurus mongoliensis (Dinosauria: Hadrosauroidea) from the Late Cretaceous of Central Asia". American Museum Novitates. 3694: 1–52. doi:10.1206/3694.2. S2CID 56372891.
  4. ^ Angel Alejandro Ramírez-Velasco; Mouloud Benammi; Albert Prieto-Márquez; Jesús Alvarado Ortega & René Hernández-Rivera (2012). "Huehuecanauhtlus tiquichensis, a new hadrosauroid dinosaur (Ornithischia: Ornithopoda) from the Santonian (Late Cretaceous) of Michoacán, Mexico". Canadian Journal of Earth Sciences. 49 (2): 379–395. doi:10.1139/e11-062.