Hadrosauriformes (lat.) - a treasure trove of herbivorous iguanodont dinosaurs living in the Cretaceous period . The clade was introduced by Paul Sereno in 1997 [2] , a definition was given to them in 1998. Hadrosauriformes are defined as Iguanodon , Parasaurolophus , their last common ancestor and all his descendants [3] [4] . David Norman's definition of the Hadrosauriformes clade: Altirhinus kurzanovi , Edmontosaurus regalis , their common ancestor and all his descendants [5] .
| † Hadrosauriformes |
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| Scientific classification |
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| No rank : | Bilateral symmetrical |
| Infraclass : | Archosauromorphs |
| No rank : | Archosauriformes |
| Infrastructure : | † Ornithopods |
| Parvotryad : | † Iguanodonts |
| Treasure : | † Ankylopollexia |
| Treasure : | † Styracosterna |
| Treasure : | † Hadrosauriformes |
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| International scientific name |
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Hadrosauriformes Sereno , 1997 |
| Synonyms |
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Content
Paul Sereno in 1986 proposed the inclusion of iguanodon and all advanced iguanodonts in Iguanodontoidea. Then, in 1997, he renamed the treasure Iguanodontoidea to Hadrosauriformes without explanation. Some systematic analyzes, as well as the Norman analysis of 2004, do not support the topology of Sereno, so the names of the treasures and their component taxa should be, in his opinion, revised. At the same time, Norman called for the preservation of the Iguanodontoidea treasure, although in an amended form [1] . Phylogenetic analysis by David Norman in 2015 forced him to reconsider the definition of Hadrosauriformes, excluding the iguanodont and related taxa that formed one clade from it [5] . Some researchers continued to use the Iguanodontoidea clade as the older synonym for Hadrosauriformes [6] [7] , while others used the Hadrosauriformes clade in their phylogenetic studies in the classical definition of Sereno [8] [9] .
The clade Iguanodontoidea, renamed Sereno to Hadrosauriformes, is diagnosed by the following criteria: the margin of the maxilla is strongly displaced relative to the jawbone; an implanted type of articulation of the jaw and zygomatic bones; the development of a pronounced diastema between the beak and the teeth; protrusions in the form of papillae on the marginal denticles of teeth; crowns of maxillary teeth narrower and lanceolate crowns of dental teeth; metacarpals densely pressed against each other from 2nd to 4th; wide, flattened laterally prefrontal process; the fourth spit of the femur is triangular in shape; an almost tubular groove for the extensor muscle; blunt claw phalanges of the foot [1] .
A cladogram (majority agreement) obtained during a phylogenetic study using 135 characters for 47 taxa, reflecting the place of Hadrosauriformes in Styracosterna and the taxonomic composition [9] :
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| Camptosaurus |
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| Iguanacolossus |
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| Dakotadon |
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| Delapparentia |
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| Lurdusaurus |
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| Lanzhousaurus |
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| Barilium |
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| Hypselospinus |
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| Fukuisaurus |
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| Hadrosauriformes |
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| Hadrosauriformes |
| Iguanodon |
| | Hadrosauroidea |
| Mantellisaurus |
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| Ouranosaurus |
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| Altirhinus |
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| Morelladon |
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| Proa |
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| Batyrosaurus |
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| Gongpoquansaurus |
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| Probactrosaurus |
| | Hadrosauromorpha |
| Jintasaurus |
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| Jeyawati |
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| Nanningosaurus |
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| Nanyangosaurus |
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| Yunganglong |
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| Gilmoreosaurus |
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| Levnesovia |
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| Bactrosaurus |
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| Tanius |
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| Huehuecanauhtlus |
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| Zhanghenglong |
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| Plesiohadros |
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| Shuangmiaosaurus |
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| Telmatosaurus |
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| Tethyshadros |
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- ↑ 1 2 3 Norman DB 2004. Basal Iguanodontia. In DB Weishampel, P. Dodson, and H. Osmolska (eds.), The Dinosauria (2nd edition). University of California Press, Berkeley 413-437.
- ↑ Sereno PC 1997. The origin and evolution of dinosaurs. Annu. Rev. Earth Planet. Sci. 25 : 435-489.
- ↑ You H., Ji Q., Li J. and Li Y. 2003. A new hadrosauroid dinosaur from the mid-Cretaceous of Liaoning, China. Acta Geologica Sinica 77 (2): 148-154.
- ↑ Hans-Dieter Sues and Alexander Averianov. 2009. A new basal hadrosauroid dinosaur from the Late Cretaceous of Uzbekistan and the early radiation of duck-billed dinosaurs. Proceedings of the Royal Society B: Biological Sciences 276 (1667): 2549-2555.
- ↑ 1 2 Norman DB 2015. On the history, osteology, and systematic position of the Wealden (Hastings group) dinosaur Hypselospinus fittoni (Iguanodontia: Styracosterna). Zoological Journal of the Linnean Society 173 : 92-189.
- ↑ Paul, Gregory S. 2008. A revised taxonomy of the iguanodont dinosaur genera and species. Cretaceous Research 29 (2): 192-216.
- ↑ Wu WH., Godefroit P. 2012. Anatomy and relationships of Bolong yixianensis, an Early Cretaceous iguanodontoid dinosaur from westernLiaoning, China. In: Godefroit P, ed. Bernissart dinosaurs and Early Cretaceous terrestrial ecosystems. Bloomington: Indiana University Press 174-212.
- ↑ Xing H., Wang D., Han F., Sullivan C., Ma Q., He Y., Hone DWE, Yan R., Du F., Xu X. 2014. A New Basal Hadrosauroid Dinosaur (Dinosauria: Ornithopoda ) with Transitional Features from the Late Cretaceous of Henan Province, China. PLoS ONE 9 (6): e98821.
- ↑ 1 2 Andrew T. McDonald; Terry A. Gates; Lindsay E. Zanno; Peter J. Makovicky. 2017. Anatomy, taphonomy, and phylogenetic implications of a new specimen of Eolambia caroljonesa (Dinosauria: Ornithopoda) from the Cedar Mountain Formation, Utah, USA. PLoS ONE 12 (5): e0176896.