{"title":"A New Eusauropod Dinosaur from the Lower and Middle Jurassic Wangmen Formation of Ningming County, Guangxi, South China","authors":"Jinyou MO, Xiuzhen ZHOU, Qiongyao FU, Duo XIONG, Minhang HU, Xing XU","doi":"10.1111/1755-6724.15331","DOIUrl":null,"url":null,"abstract":"<p>We report a new eusauropod dinosaur, <i>Huashanosaurus qini</i> gen. et sp. nov., based on a partial skeleton recovered from a bed in the Lower to Middle Jurassic Wangmen Formation (Fm.) from Huqiu Quarry near Mingjiang River, Ningming County, Guangxi Zhuang Autonomous Region, southern China. The new taxon can be diagnosed by the following autapomorphies: posterior process of the ulna hook-shaped; the cross-section of the proximal part of the ulna crescent-shaped; groove structure present at the posterodistal surface of the fibula. Phylogenetic analysis reveals that <i>H. qini</i> is later-diverging than the Middle Jurassic <i>Shunosaurus.</i> Previous work showed that the Wangmen Fm. is early Early Jurassic in age whereas the new eusauropod discovery indicates that the Wangmen Fm. is probably somewhat younger Early–Middle Jurassic in age. The find increases the diversity of Jurassic eusauropods in China.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"99 4","pages":"909-924"},"PeriodicalIF":3.7000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Geologica Sinica ‐ English Edition","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/1755-6724.15331","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
We report a new eusauropod dinosaur, Huashanosaurus qini gen. et sp. nov., based on a partial skeleton recovered from a bed in the Lower to Middle Jurassic Wangmen Formation (Fm.) from Huqiu Quarry near Mingjiang River, Ningming County, Guangxi Zhuang Autonomous Region, southern China. The new taxon can be diagnosed by the following autapomorphies: posterior process of the ulna hook-shaped; the cross-section of the proximal part of the ulna crescent-shaped; groove structure present at the posterodistal surface of the fibula. Phylogenetic analysis reveals that H. qini is later-diverging than the Middle Jurassic Shunosaurus. Previous work showed that the Wangmen Fm. is early Early Jurassic in age whereas the new eusauropod discovery indicates that the Wangmen Fm. is probably somewhat younger Early–Middle Jurassic in age. The find increases the diversity of Jurassic eusauropods in China.
根据广西宁明县明江附近虎丘采石场下至中侏罗统王门组（Fm.）地层中发现的部分骨架，报道了一种新的真蜥脚类恐龙——华山龙（Huashanosaurus qini gen. et sp. nov.）。新分类群可通过以下自形态进行诊断：尺骨后突钩状；尺骨近端截面呈新月形；在腓骨的后远端表面有沟结构。系统发育分析表明，齐尼猿人的分化晚于中侏罗世的剑龙。先前的研究表明，王门Fm。属于早侏罗世早期，而新发现的真蜥脚类动物表明，王门组的化石属于早侏罗世早期。在年龄上可能更年轻，早中侏罗世。这一发现增加了中国侏罗纪真蜥脚类动物的多样性。
期刊介绍：
Acta Geologica Sinica mainly reports the latest and most important achievements in the theoretical and basic research in geological sciences, together with new technologies, in China. Papers published involve various aspects of research concerning geosciences and related disciplines, such as stratigraphy, palaeontology, origin and history of the Earth, structural geology, tectonics, mineralogy, petrology, geochemistry, geophysics, geology of mineral deposits, hydrogeology, engineering geology, environmental geology, regional geology and new theories and technologies of geological exploration.
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