Skeletal mount of Probactrosaurus gobiensis, copyright Greg Goebel.

Belongs within: Iguanodontia.
Contains: Hadrosauridae.

The name Hadrosauroidea has been used for a clade uniting the Hadrosauridae and Ouranosaurus; it is here used for the smallest clade uniting these two taxa as found in the phylogenetic analysis by Norman (2004). Supporting characters for this clade were not explicitly listed. Ouranosaurus nigeriensis was a relatively large ornithopod from the early Cretaceous of Niger, most noted from the relatively long neural spines arising from its vertebrae.

    |  i. s.: Jinzhousaurus Wang & Xu 2001N04
    |           `--J. yangi Wang & Xu 2001N04
    |         Zhuchengosaurus maximusP10
    |         Shuangmiaosaurus You, Ji et al. 2003P10, N04
    |           `--S. gilmorei You, Ji et al. 2003N04
    |         Levnesovia transoxianaP10
    |         Tethyshadros insularisP10
    |--Ouranosaurus Taquet 1976N04
    |    `--O. nigeriensis Taquet 1976N04
    `--+--+--Eolambia Kirkland 1998N04
       |  |    `--E. caroljonesa Kirkland 1998N04
       |  `--Altirhinus Norman 1998N04
       |       `--A. kurzanovi Norman 1998N04
       `--+--Protohadros Head 1998N04
          |    `--P. byrdi Head 1998N04
             |  `--Nanyangosaurus Xu, Zhao et al. 2000XZ00
             |       `--*N. zhugeii Xu, Zhao et al. 2000XZ00
             `--Probactrosaurus Rozhdestvensky 1966N04
                  |--P. alashanicus Rozhdestvensky 1966N04
                  |--P. gobiensis Rozhdestvensky 1966N04
                  `--P. mazongshanensis Lü 1997N04

*Type species of generic name indicated


[N04] Norman, D. B. 2004. Basal Iguanodontia. In: Weishampel, D. B., P. Dodson & H. Osmólska (eds) The Dinosauria 2nd ed. pp. 413–437. University of California Press: Berkeley.

[P10] Paul, G. S. 2010. Dinosaurs: A Field Guide. A & C Black.

[XZ00] Xu X., Zhao X.-J., Lü J.-C., Huang W.-B., Li Z.-Y. & Dong Z.-M. 2000. A new iguanodontian from Sangping Formation of Neixiang, Henan and its stratigraphical implication. Vertebrata PalAsiatica 38 (3): 176–191.

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