Biology:Lanzhousaurus
| Lanzhousaurus | |
|---|---|
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| Skeletal mount of Lanzhousaurus | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Ornithopoda |
| Clade: | †Styracosterna |
| Genus: | †Lanzhousaurus You, Ji & Li, 2005 |
| Type species | |
| †Lanzhousaurus magnidens You, Ji & Li, 2005
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Lanzhousaurus (meaning "Lanzhou lizard") is a genus of ornithopod dinosaur. Lanzhousaurus lived in the Gansu region of what is now China during the Early Cretaceous (Barremian). A partial skeleton has been recovered from the Hekou Group. It was described by You, Ji and Li in 2005 and the type and only species is Lanzhousaurus magnidens.[1] It's been estimated to be about 10 meters (33 feet) in length and 6 tonnes (6.6 short tons) in weight.[2]
Dentition
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The genus has been described as having "astonishingly huge teeth", among the largest for any herbivorous creature ever, which indicate it was a styracosternan iguanodont. The mandible, longer than one meter, suggests a very large size for the animal. Tooth enamel of this dinosaur was growing very rapidly.[3]
Classification
In their 2020 reassessment of the hadrosauromorph Orthomerus, Madzia, Jagt & Mulder ran phylogenetic analyses of Iguanodontia. In their analyses, Lanzhousaurus was recovered as a non-hadrosauriform styracosternan member of the Ankylopollexia, similar to the 2005 description by You, Ji & Li. The results of their phylogenetic analyses are shown in the cladogram below:[4][1]
| Ankylopollexia |
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References
- ↑ 1.0 1.1 You, Hailu; Ji, Qiang; Li, Daqing (2005). "Lanzhousaurus magnidens gen. et sp. nov. from Gansu Province, China: the largest-toothed herbivorous dinosaur in the world" (in en). Geological Bulletin of China 24 (9): 785–794. ISSN 1671-2552. https://www.researchgate.net/publication/294696068_Lanzhousaurus_magnidens_gen_et_sp_nov_from_Gansu_Province_China_The_largest-toothed_herbivorous_dinosaur_in_the_world.
- ↑ Paul, Gregory S. (2016). The Princeton Field Guide to Dinosaurs (2nd ed.). New Jersey: Princeton University Press. pp. 319.
- ↑ Celina A. Suarez, Hai-Lu You, Marina B. Suarez, Da-Qing Li & J. B. Trieschmann (2017). Stable Isotopes Reveal Rapid Enamel Elongation (Amelogenesis) Rates for the Early Cretaceous Iguanodontian Dinosaur Lanzhousaurus magnidens. Scientific Reports 7, Article number: 15319 (2017). doi:10.1038/s41598-017-15653-6
- ↑ Madzia, Daniel; Jagt, John W. M.; Mulder, Eric W. A. (2020-04-01). "Osteology, phylogenetic affinities and taxonomic status of the enigmatic late Maastrichtian ornithopod taxon Orthomerus dolloi (Dinosauria, Ornithischia)". Cretaceous Research 108: 104334. doi:10.1016/j.cretres.2019.104334. ISSN 0195-6671. https://www.sciencedirect.com/science/article/pii/S0195667119302654.
Wikidata ☰ Q735082 entry
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