Hadrosauroidea

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Hadrosauroids Fossil range: Cretaceous
Ouranosaurus
Scientific classification
Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Ornithischia Suborder: Cerapoda Infraorder: Ornithopoda Superfamily: Hadrosauroidea Cope, 1869
Families
Hadrosauridae

Hadrosauroidea is a clade or superfamily of ornithischian dinosaurs that includes the "duck-billed" dinosaurs, or hadrosaurids, and their close relatives. Many primitive hadrosauroids, such as the sail-backed Ouranosaurus, have traditionally been included in a paraphyletic (unnatural grouping) "Iguanodontidae". With cladistic analysis, the traditonal Iguanodontidae has been largely disbanded, and probably includes only Iguanodon and perhaps its closest relatives.

[edit] Classification

[edit] Taxonomy

• Superfamily Hadrosauroidea
  • ?Nanyangosaurus
  • ?Jinzhousaurus
  • ?Equijubus
  • ?Shuangmiaosaurus
  • Ouranosaurus
  • Fukuisaurus
  • Penelopognathus
  • Altirhinus
  • Eolambia
  • Protohadros
  • Probactrosaurus
  • Family Hadrosauridae

[edit] Phylogeny

Cladogram after Norman (2002) and Godefroit, Li & Shang (2005).

Hadrosauroidea
|--Penelopognathus
|--+--Altirhinus
|  `--Eolambia
`--+--Protohadros
   `--+--Probactrosaurus
      `--Hadrosauridae
         |--Telmatosaurus
         `--+--Bactrosaurus
            `--Euhadrosauria
               |--Hadrosaurinae
               `--Lambeosaurinae