Hadrosauroidea

Taxobox
name = Hadrosauroids
fossil_range = mid-Late Cretaceous

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image_width = 200px
image_caption = "Ouranosaurus"
fossil_range = Cretaceous
regnum = Animalia
phylum = Chordata
classis = Sauropsida
superordo = Dinosauria
ordo = Ornithischia
subordo = Cerapoda
infraordo = Ornithopoda
superfamilia = Hadrosauroidea
superfamilia_authority = Cope, 1869
subdivision_ranks = Families
subdivision =
* 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 traditional Iguanodontidae has been largely disbanded, and probably includes only "Iguanodon" and perhaps its closest relatives.

Classification

Taxonomy

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

Phylogeny

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

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