{{Short description|Extinct clade of dinosaurs}} {{Automatic taxobox | name = Hadrosauroids | fossil_range = Early-Late Cretaceous, {{fossilrange|130|66|PS=}} | image = Probactrosaurus v3.jpg | image_caption = ''Probactrosaurus'' | taxon = Hadrosauroidea | authority = Cope, 1869 | type_species = {{extinct}}''Hadrosaurus foulkii'' | type_species_authority = Leidy, 1858 | subdivision_ranks = Subgroups | subdivision = *{{extinct}}''Altirhinus'' *{{extinct}}''Batyrosaurus'' *{{extinct}}''Bolong'' *{{extinct}}''Brighstoneus'' *{{extinct}}''Cariocecus'' *{{extinct}}''Choyrodon'' *{{extinct}}''Comptonatus'' *{{extinct}}''Datonglong'' *{{extinct}}''Equijubus'' *{{extinct}}''Gongpoquansaurus'' *{{extinct}}''Haolong'' *{{extinct}}''Hypsibema''? *{{extinct}}''Jinzhousaurus'' *{{extinct}}''Koshisaurus'' *{{extinct}}''Ouranosaurus'' *{{extinct}}''Penelopognathus'' *{{extinct}}''Portellsaurus'' *{{extinct}}''Probactrosaurus'' *{{extinct}}''Qianjiangsaurus'' *{{extinct}}''Siamodon'' *{{extinct}}''Sirindhorna'' *{{extinct}}''Xuwulong'' *{{extinct}}''Zuoyunlong'' *{{extinct}}Hadrosauromorpha | synonyms = * Trachodontoidea <small>Lydekker, 1888</small> * Hadrosauria <small>Huene, 1956</small> }}
'''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.
==Classification== Hadrosauroidea was given a formal phylogenetic definition in the ''PhyloCode'' by Daniel Madzia and colleagues in 2021 as "the largest clade containing ''Hadrosaurus foulkii'', but not ''Iguanodon bernissartensis''".<ref name="madziaea21">{{cite journal |last1=Madzia |first1=D. |last2=Arbour |first2=V.M. |last3=Boyd |first3=C.A. |last4=Farke |first4=A.A. |last5=Cruzado-Caballero |first5=P. |last6=Evans |first6=D.C. |title=The phylogenetic nomenclature of ornithischian dinosaurs |journal=PeerJ |date=2021 |volume=9 |article-number=e12362 |doi=10.7717/peerj.12362|doi-access=free |pmid=34966571 |pmc=8667728 }}</ref> The cladogram below follows an analysis by Andrew McDonald, 2012, and shows the position of Hadrosauroidea within Styracosterna:<ref name=McDonaldUpdate>{{Cite journal | last1 = McDonald | first1 = A. T. | title = Phylogeny of basal iguanodonts (Dinosauria: Ornithischia): an update | doi = 10.1371/journal.pone.0036745 | journal = PLOS ONE | volume = 7 | issue = 5 | article-number = e36745 | year = 2012 | pmid = 22629328| pmc =3358318 | doi-access = free | bibcode = 2012PLoSO...736745M }}</ref>
{{clade| style=font-size:100%;line-height:80% |label1=Styracosterna |1={{clade |1=''Uteodon aphanoecetes'' |3={{clade |1={{clade |1=''Hippodraco scutodens'' |2=''Theiophytalia kerri'' }} |2={{clade |1=''Iguanacolossus fortis'' |2={{clade |1=''Lanzhousaurus magnidens'' 80px |2={{clade |1=''Kukufeldia tilgatensis'' |2={{clade |1=''Barilium dawsoni'' |label2=Hadrosauriformes |2={{clade |1=''Iguanodon bernissartensis'' 80px |label2='''Hadrosauroidea''' |2={{clade |1=''Mantellisaurus atherfieldensis'' 80px |2=Other hadrosauroids 80px}} }} }} }} }} }} }} }} }}
The cladogram below follows an analysis by Wu Wenhao and Pascal Godefroit (2012):<ref name=BolongRev>{{cite book |author1=Wu Wenhao |author2=Pascal Godefroit |name-list-style=amp |year=2012 |chapter=Anatomy and relationships of ''Bolong yixianensis'', an Early Cretaceous iguanodontoid dinosaur from western Liaoning, China |editor=Godefroit, P. |title=Bernissart Dinosaurs and Early Cretaceous Terrestrial Ecosystems |url=https://archive.org/details/bernissartdinosa00gode |url-access=limited |publisher=Indiana University Press |pages=[https://archive.org/details/bernissartdinosa00gode/page/n309 293]–333}}</ref> {{clade| style=font-size:90%;line-height:85% |label1=Hadrosauriformes |1={{clade |label1=Iguanodontidae |1={{clade |1=''Iguanodon'' 80px |2={{clade |1=''Ouranosaurus'' |2=''Mantellisaurus'' 80px}} }} |label2='''Hadrosauroidea''' |2={{clade |1=''Bolong'' |2={{clade |1=''Equijubus'' |2={{clade |1=''Jinzhousaurus'' |2={{clade |1=''Altirhinus'' |2={{clade |1=''Batyrosaurus'' |2={{clade |1=''Probactrosaurus'' |2={{clade |1=''Eolambia'' |2={{clade |1=''Protohadros'' |2={{clade |1=''Bactrosaurus'' |2=''Levnesovia'' |3={{clade |1=''Shuangmiaosaurus'' |2={{clade |1=''Tethyshadros'' 80px |2={{clade |1=''Telmatosaurus'' |2=Hadrosauridae 80px}} }} }} }} }} }} }} }} }} }} }} }} }} }}
Cladogram after Prieto-Marquez and Norell (2010):<ref name="Prieto-Marquez2010">{{cite journal |author=Albert Prieto-Marquez |author2=Mark A. Norell |name-list-style=amp |year=2010 |title=Anatomy and relationships of ''Gilmoreosaurus mongoliensis'' (Dinosauria: Hadrosauroidea) from the Late Cretaceous of Central Asia |journal=American Museum Novitates |issue=3694 |pages=1–52 |url=https://digitallibrary.amnh.org/items/ad60ee42-08a4-47ce-9f49-e62ba5b8ea64 |doi=10.1206/3694.2 |s2cid=56372891 }}</ref>
{{clade| style=font-size:90%;line-height:85% |label1='''Hadrosauroidea''' |1={{clade |1={{clade |1=''Jinzhousaurus'' |2=''Penelopognathus'' }} |2={{clade |1=''Equijubus'' |2={{clade |1=''Probactrosaurus'' |2={{clade |1={{clade |1=''Eolambia'' |2=''Protohadros'' }} |2={{clade |1=''Tanius'' |2={{clade |1=''Bactrosaurus'' |2={{clade |1=''Gilmoreosaurus'' |2={{clade |1=''Telmatosaurus'' |2={{clade |1=''Shuangmiaosaurus'' |2=''Nanyangosaurus'' |3=''Lophorhothon'' |4=Hadrosauridae 80px}} }} }} }} }} }} }} }} }} }}
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:<ref name=Huehuecanauhtlus>{{Cite journal|author1=Angel Alejandro Ramírez-Velasco |author2=Mouloud Benammi |author3=Albert Prieto-Márquez |author4=Jesús Alvarado Ortega |author5=René Hernández-Rivera |name-list-style=amp |year=2012 |title=''Huehuecanauhtlus tiquichensis'', a new hadrosauroid dinosaur (Ornithischia: Ornithopoda) from the Santonian (Late Cretaceous) of Michoacán, Mexico |journal=Canadian Journal of Earth Sciences |volume=49 |issue=2 |pages=379–395 |doi=10.1139/e11-062 |bibcode=2012CaJES..49..379R |url=http://www.nrcresearchpress.com/doi/abs/10.1139/e11-062 |url-access=subscription }}</ref>
{{clade| style=font-size:90%;line-height:85% |label1='''Hadrosauroidea''' |1={{clade |1=''Jinzhousaurus yangi'' |2={{clade |1=''Fukuisaurus tetoriensis'' |2={{clade |1=''Penelopognathus weishampeli'' |2={{clade |1=''Equijubus normani'' |2={{clade |1=''Probactrosaurus gobiensis'' |2={{clade |1={{clade |1=''Eolambia caroljonesa'' |2=''Protohadros byrdi'' }} |2={{clade |1=''Tanius sinensis'' |2={{clade |1={{clade |1=''Bactrosaurus johnsoni'' |2=''Glishades ericksoni'' }} |2={{clade |1=''Gilmoreosaurus mongoliensis'' |2={{clade |1=''Huehuecanauhtlus tiquichensis'' |2={{clade |1={{clade |1=''Jintasaurus meniscus'' |2=''Tethyshadros insularis'' 80px}} |2=Hadrosauridae 80px}} }} }} }} }} }} }} }} }} }} }} }}
==See also== {{Portal|Dinosaurs}} * Timeline of hadrosaur research
==References== {{Reflist}}
{{Ornithopoda|H}} {{Taxonbar|from=Q1032465}}
Category:Hadrosauroidea Category:Dinosaur superfamilies Category:Cretaceous dinosaurs