云南禄丰川街盆地早侏罗世早期分化蜥脚型类恐龙新材料研究  

A new specimen of the early-branching sauropodomorph dinosaur from the Chuanjie Basin,Lufeng,Yunnan Province

作　　者：赵染尘 张世涛[1] 尤海鲁[2] 王娅明 张茜楠 王涛 ZHAO Ran-chen;ZHANG Shi-tao;YOU Hai-lu;WANG Ya-ming;ZHANG Qian-nan;WANG Tao(Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory of Vertebrate Evolution and Human Origins,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academyof Sciences,Beijing100044,China;Geological Museum of China,Beijing 100044,China;Lufeng Natural Resources Bureau,Lufeng Dinosaur Fossil Protection and Research Center,Lufeng 651299,Yunnan,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]中国科学院古脊椎动物与古人类研究所,脊椎动物演化与人类起源重点实验室,北京100044 [3]中国地质博物馆,北京100034 [4]云南禄丰市自然资源局,禄丰恐龙化石保护研究中心,云南禄丰651299

出　　处：《古生物学报》2024年第1期102-111,共10页Acta Palaeontologica Sinica

基　　金：国家自然科学基金(42288201,42002014,42372030);北京自然科学基金(5224037)联合资助。

摘　　要：目前中国早期分化的蜥脚型类恐龙化石主要发现于云南省禄丰市早侏罗世地层。本文描述的是一件产自禄丰川街盆地禄丰组的早期分化蜥脚型类恐龙新材料,包括较完整的颈椎、背椎以及破碎的肩胛骨、耻骨和脚趾骨骼。本文对其进行了详细的骨骼形态学描述,并与其他早期分化蜥脚型类进行了对比。结果表明,在禄丰组发现的所有早期分化蜥脚型类中,该标本与禄丰龙(Lufengosaurus)在形态上相似程度较高。系统发育分析结果显示,该标本与Coloradisaurus和Glacialisaurus构成一个多分支,该分支又和禄丰龙一起被归入大椎龙科。由于颈椎和背椎的椎体与椎弓未完全愈合,推测该标本的个体发育阶段为幼年—亚成年。该标本的发现提高了大椎龙科在亚洲的属种分异度,进一步扩充了对禄丰早侏罗世恐龙动物群的认识。At present,early-branching sauropodomorph dinosaurs from China are mainly discovered in the Lower Jurassic in Lufeng,Yunnan Province.A new specimen of the early-branching sauropodomorph from the Lufeng Formation of the Chuanjie Basin,Lufeng,including relatively complete cervical and dorsal vertebrae as well as a broken scapula,pubes and pedal elements,is described here.The osteological morphology of the new specimen is described in detail and compared with other early-branching sauropodomorphs.The specimen is more similar to that of Lufengosaurus than to other early-branching sauropodomorphs from the Lufeng Formation.Phylogenetic analysis recovers this specimen as a part of a polytomy with Coloradisaurus and Glacialisaurus,and they are referred to Massospondylidae along with Lufengosaurus.The unfused centrum and neural arch of the cervical and dorsal vertebrae of the new specimen indicate that the ontogenetic stage of this individual is juvenile-subadult.This discovery increases the diversity of Massospondylidae from Asia,and expands our knowledge of the Lufeng dinosaur fauna.

关 键 词：云南 早侏罗世 禄丰组 早期分化蜥脚型类 大椎龙科 

分 类 号：TS9[轻工技术与工程]