Mamenchisaurus: Difference between revisions

 

'''''Mamenchisaurus''''' ({{IPAc-en|m|ə|ˌ|m|ʌ|n|tʃ|i|ˈ|s|ɔː|r|ə|s}} {{respell|mə|MUN|chee|SOR|əs}},[https://web.archive.org/web/20070928010631/http://www.dinosauria.com/dml/names/dinom.htm Dinosauria Translation and Pronunciation Guide M] or spelling pronunciation {{IPAc-en|m|ə|ˌ|m|ɛ|n|tʃ|ɪ|ˈ|s|ɔː|r|ə|s}}) is a genus of [[sauropod]] [[dinosaur]] known for their remarkably long [[neck]]s<ref name="HDS97">{{cite book|last=Sues|first=Hans-Dieter|url=https://archive.org/details/isbn_9780253333490/page/274|title=The Complete Dinosaur|publisher=Indiana University Press|year=1997|isbn=0-253-33349-0|editor=James Orville Farlow|location=Bloomington|pages=[https://archive.org/details/isbn_9780253333490/page/274 274]|chapter=Sauropods|editor2=M. K. Brett-Surman|url-access=registration}}</ref> which made up nearly half the total body length.<ref name="DBN04">{{cite book|last=Norman|first=David B.|url=https://archive.org/details/dinosauriandedit00weis|title=The Dinosauria|publisher=University of California Press|year=2004|isbn=0-520-24209-2|editor=Weishampel, D.B.|edition=2nd|location=Berkeley|pages=[https://archive.org/details/dinosauriandedit00weis/page/n336 318]|chapter=Dinosaur Systematics|editor2=Dodson, P.|editor3=Osmólska, H.|url-access=limited}}</ref> Numerous species have been assigned to the genus; however, many of these might be questionable. Fossils have been found in the [[Sichuan Basin]] and [[Yunnan|Yunnan Province]] in China. Several species are from the [[Shaximiao Formation|Upper Shaximiao Formation]] whose geologic age is uncertain. However, evidence suggests that this be no earlier than the [[Oxfordian (stage)|Oxfordian stage]] of the [[Jurassic|Late Jurassic]]. ''M. sinocanadorum'' dates to the Oxfordian stage (158.7 to 161.2 [[Myr|mya]]) and ''M. anyuensis'' to the [[Aptian|Aptian stage]] of the [[Cretaceous|Early Cretaceous]] around 114.4 mya.<ref name="Age">{{cite journal|last1=Wang|first1=J.|last2=Norell|first2=M. A.|last3=Pei|first3=R.|last4=Ye|first4=Y.|last5=Chang|first5=S.-C|year=2019|title=Surprisingly young age for the mamenchisaurid sauropods in South China|journal=Cretaceous Research|volume=104|pages=104176|doi=10.1016/j.cretres.2019.07.006|s2cid=199099072}}</ref> Most species were medium to large size sauropods, around {{convert|15|to|26|m|sp=us}} in length and possibly up to {{convert|35|m|sp=us}} based on two undescribed vertebrae.<ref name="RussellZheng1993">Russell, D.A., Zheng, Z. (1993). "A large mamenchisaurid from the Junggar Basin, Xinjiang, People Republic of China." ''Canadian Journal of Earth Sciences'', (30): 2082-2095.</ref><ref name="paul2010">Paul, G.S. (2016). ''The Princeton Field Guide to Dinosaurs'', Princeton University Press.</ref><ref name=":7">{{Cite journal|last=Paul|first=Gregory S.|date=2019|title=Determining the largest known land animal: A critical comparison of differing methods for restoring the volume and mass of extinct animals|url=http://www.gspauldino.com/Titanomass.pdf|journal=Annals of the Carnegie Museum|volume=85|issue=4|pages=335–358|doi=10.2992/007.085.0403|s2cid=210840060}}</ref>

 

==History and species==