Mamenchisauridae
| Mamenchisauridae Temporal range: Early-Late Jurassic, 175–155 Ma | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Dinosauria |
| Order: | Saurischia |
| Suborder: | †Sauropodomorpha |
| Clade: | †Eusauropoda |
| Family: | †Mamenchisauridae Young and Zhao, 1972 |
| Genera[1] | |
| Synonyms | |
|
Omeisauridae Wilson, 2002 | |
Mamenchisauridae is a family of sauropod dinosaurs. The family was first named by Chinese paleontologists C.C. Young and X. Zhao in 1972, in a paper describing Mamenchisaurus.[4] Other mamenchisaurids may include Chuanjiesaurus, Eomamenchisaurus, Hudiesaurus, Tienshanosaurus, Omeisaurus, and Tonganosaurus. Fossils of Mamenchisaurus and Omeisaurus have been found in the Shangshaximiao Formation, dating to the Oxfordian stage, around 161.2-155.7 Ma (million years ago). Chuanjiesaurus fossils date between 175.6-161.2 Ma, while those of Eomamenchisaurus were found in the Zhanghe Formation, believed to be around 175.6-161.2 million years old.[5] Fossils of Tonganosaurus date to even earlier, from the Early Jurassic.[6]
Long-bone histology enables researchers to estimate the age that a specific individual reached. A study by Griebeler et al. (2013) examined long bone histological data and concluded that the unnamed mamenchisaurid SGP 2006/9 weighed 25,075 kilograms (27.6 short tons), reached sexual maturity at 20 years and died at age 31.[7]
References
- ↑ Holtz, Thomas R. Jr. (2012) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages, Winter 2011 Appendix.
- ↑ Jian-Dong Huang, Hai-Lu You, Jing-Tao Yang and Xin-Xin Ren (2014). "A new sauropod dinosaur from the Middle Jurassic of Huangshan, Anhui Province" (PDF). Vertebrata PalAsiatica. 52 (4): 390–400.
- ↑ Qijianglong guokr: New Long-Necked Dinosaur Discovered in China
- ↑ Young, C.C. and Zhao, X. (1972). "Mamenchisaurus hochuanensis sp. nov.". Institute of Vertebrate Palaeontology and Palaeoanthropology Monographs Series A 8: 1-30.
- ↑ Lü, J., Li, T., Zhong, S., Ji, Q., and Li, S. (2008). "A new mamenchisaurid dinosaur from the Middle Jurassic of Yuanmou, Yunnan Province, China". Acta Geologica Sinica 82(1) :17-26.
- ↑ Li, K., Yang, C.-Y., Liu, J. and Wang, Z.-X. (2010). "A new sauropod dinosaur from the Lower Jyrassic of Huili, Sichuan, China." Vertebrata Palasiatica, (3).
- ↑ Griebeler EM, Klein N, Sander PM (2013) Aging, Maturation and Growth of Sauropodomorph Dinosaurs as Deduced from Growth Curves Using Long Bone Histological Data: An Assessment of Methodological Constraints and Solutions. PLoS ONE 8(6): e67012. doi:10.1371/journal.pone.0067012
Sources
- Currie, Philip J.; Kevin Padian. Encyclopedia of Dinosaurs. p. 122.