Mamenchisauridae

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Mamenchisauridae
Temporal range: Early Jurassic-Early Cretaceous, Pliensbachian–Berriasian
Mamench DB.jpg
Mamenchisaurus
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Order: Saurischia
Suborder: Sauropodomorpha
Clade: Sauropoda
Clade: Eusauropoda
Family: Mamenchisauridae
Young and Zhao, 1972
Genera
Synonyms

Omeisauridae Wilson, 2002

Mamenchisauridae is a family of sauropod dinosaurs known from the Jurassic and Early Cretaceous of Asia and Africa.

Classification[edit]

The family Mamenchisauridae was first erected by Chinese paleontologists C.C. Young and Zhao Xijin in 1972, in a paper describing Mamenchisaurus hochuanensis.[2] Other taxa belonging to Mamenchisauridae include Chuanjiesaurus, Datousaurus, Eomamenchisaurus, Huangshanlong, Hudiesaurus, Qijianglong, Tienshanosaurus, Omeisaurus, Tonganosaurus, Wamweracaudia, Xinjiangtitan, Yuanmousaurus, Zigongosaurus.

Paleogeography[edit]

Fossils of Mamenchisaurus and Omeisaurus have been found in the Shaximiao Formation, dating to the Bajocian-Callovian interval, around 170.3-163.5 Ma (million years ago). Chuanjiesaurus fossils date between 166.1-163.5 Ma, while those of Eomamenchisaurus were found in the Zhanghe Formation, believed to be around 175.6-161.2 million years old.[3] Fossils of Tonganosaurus date to even earlier, from the (Pliensbachian) Early Jurassic.[4] The Tendaguru taxon Wamweracaudia extends the geographic distribution of Mamenchisauridae into Africa,[5] while fossil remains from the Itat Formation suggest they also reached Siberia. [6]Additionally, an indeterminate cervical vertebra from the Phu Kradung Formation of Thailand demonstrates survival of Mamenchisauridae into the earliest Cretaceous.[7]

Paleobiology[edit]

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.[8]

References[edit]

  1. ^ Jian-Dong Huang; Hai-Lu You; Jing-Tao Yang; Xin-Xin Ren (2014). "A new sauropod dinosaur from the Middle Jurassic of Huangshan, Anhui Province" (PDF). Vertebrata PalAsiatica. 52 (4): 390–400.
  2. ^ Young, C.C. and Zhao, X. (1972). "Mamenchisaurus hochuanensis sp. nov.". Institute of Vertebrate Palaeontology and Palaeoanthropology Monographs Series A 8: 1-30.
  3. ^ 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.
  4. ^ 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).
  5. ^ Philip D Mannion, Paul Upchurch, Daniela Schwarz, Oliver Wings; Taxonomic affinities of the putative titanosaurs from the Late Jurassic Tendaguru Formation of Tanzania: phylogenetic and biogeographic implications for eusauropod dinosaur evolution, Zoological Journal of the Linnean Society, , zly068, https://doi.org/10.1093/zoolinnean/zly068
  6. ^ https://link.springer.com/article/10.1007/s12542-018-00445-8
  7. ^ Suteethorn, S., Le Loeuff, J., Buffetaut, E., Suteethorn, V., and Wongko, K. 2013. First evidence of a mamenchisaurid dinosaur from the Upper Jurassic–Lower Cretaceous Phu Kradung Formation of Thailand. Acta Palaeontologica Polonica 58 (3): 459–469.
  8. ^ 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[edit]

  • Currie, Philip J.; Kevin Padian. Encyclopedia of Dinosaurs. p. 122.