You Hai-Lu, Azuma Yoichi, Wang Tao, Wang Ya-Ming, Dong Zhi-Ming
Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, 142 Xizhimenwai Dajie, Beijing, 100044, P. R. China.; Email:
Fukui Prefectural University, 4-1-1 Kenjojima, Matsuoka, Eiheiji-cho, Yoshida-gun, Fukui 910-1195, Japan; Email: unknown.
Zootaxa. 2014 Oct 16;3873(3):233-49. doi: 10.11646/zootaxa.3873.3.3.
Coelophysoid dinosaurs represent the earliest major radiation of neotheropods. These small-to-medium-sized agile bipeds lived throughout much of Pangaea during the Late Triassic-arly Jurassic. Previously reported coelophysoid material from Asia (excluding the Gondwanan territory of India) is limited to two specimens that comprise only limb fragments. This paper describes a new genus and species of coelophysoid, Panguraptor lufengensis, from the Lower Jurassic Lufeng Formation of Yunnan Province, China. The new taxon is represented by a well-preserved skeleton, including the skull and lower jaw, the presacral vertebral column and partial ribs, the right scapula, a partial forelimb, part of the pelvic girdle, and an almost complete hind limb. It is distinguished from other coelophysoid theropods by the unique combination of the following three character states: 1) diagonal (rostrodorsal-caudoventral) ridge on lateral surface of maxilla, within antorbital fossa, 2) elliptical, laterally facing fenestra caudodorsal to aforementioned diagonal ridge, and 3) hooked craniomedial corner of distal tarsal IV. Cladistic analysis recovers Panguraptor lufengensis deeply nested within Coelophysoidea as a member of Coelophysidae, and it is more closely related to Coelophysis than to "Syntarsus". Panguraptor represents the first well-preserved coelophysoid theropod dinosaur from Asia, and provides fresh evidence supporting the hypothesis that terrestrial tetrapods tended to be distributed pan-continentally during the Early Jurassic.
腔骨龙类恐龙代表了新兽脚类恐龙最早的一次主要辐射演化。这些中小型的敏捷两足动物在晚三叠世至早侏罗世期间生活在泛大陆的大部分地区。此前报道的来自亚洲（不包括印度的冈瓦纳地区）的腔骨龙类化石材料仅限于两个标本，仅包含肢体碎片。本文描述了一种来自中国云南省下侏罗统禄丰组的新的腔骨龙类属种——禄丰庞氏猎龙。这个新分类单元以一具保存完好的骨骼为代表，包括头骨和下颌、荐前脊柱和部分肋骨、右肩胛骨、部分前肢、部分骨盆带以及几乎完整的后肢。它与其他腔骨龙类兽脚亚目恐龙的区别在于以下三个特征状态的独特组合：1）上颌骨侧面在眶前窝内有一条斜向（吻背 - 尾腹）嵴；2）在上述斜向嵴的尾背侧有一个椭圆形、侧向开口的窗孔；3）远端跗骨IV的内侧角呈钩状。支序分析表明，禄丰庞氏猎龙作为腔骨龙科的一员，深深嵌套在腔骨龙类之中，并且它与腔骨龙的亲缘关系比与“合跗龙”更近。庞氏猎龙代表了亚洲首个保存完好的腔骨龙类兽脚亚目恐龙，为支持早侏罗世陆地四足动物倾向于泛大陆分布这一假说提供了新证据。
