Biology:Mamenchisauridae

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Short description: Extinct family of dinosaurs

Mamenchisauridae
Temporal range: 184.5–114 Ma
Possible Albian record
Mamench DB.jpg
Mamenchisaurus
Zigong Dinosaur Museum Mamenchisaurus hochuanensis below.jpg
Skeleton of Mamenchisaurus hochuanensis
Scientific classification e
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Sauropodomorpha
Clade: Sauropoda
Clade: Eusauropoda
Family: Mamenchisauridae
Young and Zhao, 1972
Genera
Synonyms
  • Omeisauridae Wilson, 2002

Mamenchisauridae is a family of sauropod dinosaurs belonging to Eusauropoda known from the Jurassic and Early Cretaceous of Asia and Africa. Some members of the group reached gigantic sizes, amongst the largest of all sauropods.[1]

Classification

The family Mamenchisauridae was first erected by Chinese paleontologists Yang Zhongjian ("C.C. Young") and Zhao Xijin in 1972, in a paper describing Mamenchisaurus hochuanensis.[2]

The most complete cladogram of Mamenchisauridae is presented by Moore et al., 2020, which includes several named species. Notably, some iterations of their analysis recover Euhelopus and kin, usually considered somphospondylians, as relatives of mamenchisaurids, mirroring earlier conceptions about the family.[3]

Topology A: Implied-weights analysis, Gonzàlez Riga dataset[3]

  Mamenchi‑  

Tienshanosaurus chitaiensis

core
  Mamenchi‑  

Omeisaurus junghsiensis

Wamweracaudia keranjei

Qijianglong guokr

Mamenchisaurus sinocanadorum

Chuanjiesaurus anaensis

Analong chuanjieensis

Mamenchisaurus hochuanensis (holotype)

Mamenchisaurus hochuanensis (referred)

Mamenchisaurus youngi

Shishugou cervicodorsals

Phu Kradung taxon

Klamelisaurus gobiensis

saurus
like taxa
sauridae

Topology B: Time-calibrated Bayesian analysis, Gonzàlez Riga dataset[3]

  Euhelopodidae  
   

Omeisaurus junghsiensis

Cetiosauriscus stewarti

Omeisaurus maoianus

Omeisaurus tianfuensis

Tienshanosaurus chitaiensis

core
  Mamenchi‑  

Chuanjiesaurus anaensis

Analong chuanjieensis

Qijianglong guokr

Shishugou cervicodorsals

Mamenchisaurus sinocanadorum

Mamenchisaurus hochuanensis (holotype)

Mamenchisaurus constructus

Phu Kradung taxon

Klamelisaurus gobiensis

Mamenchisaurus hochuanensis (referred)

Mamenchisaurus youngi

Wamweracaudia keranjei

Xianshanosaurus shijiagouensis

Daxiatitan binglingi

Euhelopus zdanskyi

Dongbeititan dongi

saurus
like taxa

In addition to several taxa above, a paper by Ren et al. (2022) also includes Rhoetosaurus, Spinophorosaurus, and Yuanmousaurus within the family.[4]

  Mamenchi‑  

Spinophorosaurus

Analong

Omeisaurus tianfuensis

Omeisaurus puxiani

Rhoetosaurus

Yuanmousaurus

Chuanjiesaurus

Wamweracaudia

Mamenchisaurus youngi

sauridae

A 2023 study also includes Hudiesaurus, Xinjiangtitan, Rhomaleopakhus, and the juvenile Bellusaurus and Daanosaurus within the family.[5]

Mamenchisauridae
   

Tienshanosaurus

   

Omeisaurus junghsiensis

   

Wamweracaudia

   

Qijianglong

   

Mamenchisaurus constructus

Bellusaurus

Rhomaleopakhus

Chuanjiesaurus

Analong

Mamenchisaurus youngi

Mamenchisaurus hochuanensis (holotype)

Shishugou cervicodorsals

Phu Krandung taxon

Klamelisaurus

Mamenchisaurus sinocanadorum

Xinjiangtitan

Hudiesaurus

Daanosaurus

Mamenchisaurus hochuanensis (referred)

Paleobiology

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.[6]

Paleoecology

Fossils of Mamenchisaurus and Omeisaurus have been found in the Shaximiao Formation, dating to the Oxfordian-Tithonian interval, around 159-150 Ma (million years ago). Chuanjiesaurus fossils date between 166.1 and 163.5 Ma, while those of Eomamenchisaurus were found in the Zhanghe Formation, believed to be around 175.6-161.2 million years old.[7] Fossils of Tonganosaurus date to even earlier, from the (Pliensbachian) Early Jurassic.[8] The Tendaguru Formation taxon Wamweracaudia from Tanzania extends the geographic distribution of Mamenchisauridae into Africa,[9] while fossil remains from the Itat Formation in Russia suggest they also reached Siberia.[10] Additionally, an indeterminate cervical vertebra from the Phu Kradung Formation of Thailand demonstrates survival of Mamenchisauridae into the Cretaceous combined with new radiometric dates for the Suining Formation that has yielded fossils of Mamenchisaurus anyuensis.[11][12]

References

  1. "An evolutionary cascade model for sauropod dinosaur gigantism--overview, update and tests". PLOS ONE 8 (10): e78573. 2013-10-30. doi:10.1371/journal.pone.0078573. PMID 24205267. Bibcode2013PLoSO...878573S. 
  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. 3.0 3.1 3.2 Moore, A.J.; Upchurch, P.; Barrett, P.M.; Clark, J.M.; Xing, X. (2020). "Osteology of Klamelisaurus gobiensis (Dinosauria, Eusauropoda) and the evolutionary history of Middle–Late Jurassic Chinese sauropods". Journal of Systematic Palaeontology 18 (16): 1299–1393. doi:10.1080/14772019.2020.1759706. 
  4. "Re-examination of Dashanpusaurus dongi (Sauropoda: Macronaria) supports an early Middle Jurassic global distribution of neosauropod dinosaurs". Palaeogeography, Palaeoclimatology, Palaeoecology 610: 111318. 2022. doi:10.1016/j.palaeo.2022.111318. 
  5. Moore, Andrew J.; Barrett, Paul M.; Upchurch, Paul; Liao, Chun-Chi; Ye, Yong; Hao, Baoqiao; Xu (2023). "Re-assessment of the Late Jurassic eusauropod Mamenchisaurus sinocanadorum Russell and Zheng, 1993, and the evolution of exceptionally long necks in mamenchisaurids". Journal of Systematic Palaeontology 21 (1). doi:10.1080/14772019.2023.2171818. https://www.tandfonline.com/doi/full/10.1080/14772019.2023.2171818. 
  6. 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
  7. "A new mamenchisaurid dinosaur from the Middle Jurassic of Yuanmou, Yunnan Province, China.". Acta Geologica Sinica - English Edition 82 (1): 17–26. February 2008. doi:10.1111/j.1755-6724.2008.tb00320.x. 
  8. "A new auropod dinosaur from the Lower Jyrassic of Huili, Sichuan, China". Vertebrata PalAsiatica 3. 2010. 
  9. "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 185 (m 3): 784–909. February 2019. doi:10.1093/zoolinnean/zly068. 
  10. "Sauropod remains from the Middle Jurassic Itat Formation of West Siberia, Russia". PalZ 93 (4): 691–701. 2019. doi:10.1007/s12542-018-00445-8. 
  11. "Surprisingly young age for the mamenchisaurid sauropods in South China.". Cretaceous Research 104: 104176. December 2019. doi:10.1016/j.cretres.2019.07.006. 
  12. "First evidence of a mamenchisaurid dinosaur from the Upper Jurassic-Lower Cretaceous Phu Kradung Formation of Thailand.". Acta Palaeontologica Polonica 58 (3): 459–469. February 2012. doi:10.4202/app.2009.0155. 

Sources

  • Encyclopedia of Dinosaurs. p. 122. 


Wikidata ☰ Q138692 entry