Biology:Hadrosauroidea

Short description: Extinct clade of dinosaurs

Hadrosauroids Temporal range: Early-Late Cretaceous, 130–66 Ma PreЄ Є O S D C P T J K Pg N
Probactrosaurus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	†Ornithischia
Clade:	†Ornithopoda
Clade:	†Hadrosauriformes
Superfamily:	†Hadrosauroidea Cope, 1869
Type species
†Hadrosaurus foulkii Leidy, 1858
Subgroups
†Altirhinus †Batyrosaurus †Bolong? †Choyrodon †Datonglong †Equijubus †Gongpoquansaurus †Gonkoken †Koshisaurus †Jinzhousaurus? †Mantellisaurus? †Ouranosaurus? †Penelopognathus †Portellsaurus †Probactrosaurus †Siamodon †Sirindhorna †Xuwulong †Zuoyunlong †Hadrosauromorpha
Synonyms
Trachodontoidea Lydekker, 1888 Hadrosauria Huene, 1956

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

The cladogram below follows an analysis by Andrew McDonald, 2012, and shows the position of Hadrosauroidea within Styracosterna.

Styracosterna	Uteodon aphanoecetes         Hippodraco scutodens     Theiophytalia kerri         Iguanacolossus fortis       Lanzhousaurus magnidens       Kukufeldia tilgatensis       Barilium dawsoni   Hadrosauriformes   Iguanodon bernissartensis   Hadrosauroidea   Mantellisaurus atherfieldensis     Other hadrosauroids

The cladogram below follows an analysis by Wu Wenhao and Pascal Godefroit (2012).

Hadrosauriformes	Iguanodontidae    Iguanodon       Ouranosaurus     Mantellisaurus        Hadrosauroidea    Bolong       Equijubus       Jinzhousaurus       Altirhinus       Batyrosaurus       Probactrosaurus       Eolambia       Protohadros       Bactrosaurus     Levnesovia       Shuangmiaosaurus       Tethyshadros       Telmatosaurus     Hadrosauridae

Cladogram after Prieto-Marquez and Norell (2010).

Hadrosauroidea	Jinzhousaurus     Penelopognathus         Equijubus       Probactrosaurus         Eolambia     Protohadros         Tanius       Bactrosaurus       Gilmoreosaurus       Telmatosaurus       Shuangmiaosaurus     Nanyangosaurus     Lophorhothon     Hadrosauridae

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.

Hadrosauroidea

Jinzhousaurus yangi       Fukuisaurus tetoriensis       Penelopognathus weishampeli       Equijubus normani       Probactrosaurus gobiensis         Eolambia caroljonesa     Protohadros byrdi         Tanius sinensis         Bactrosaurus johnsoni     Glishades ericksoni         Gilmoreosaurus mongoliensis       Huehuecanauhtlus tiquichensis         Jintasaurus meniscus     Tethyshadros insularis       Hadrosauridae

See also

• Timeline of hadrosaur research

References

Wikidata ☰ Q1032465 entry