A new neornithischian dinosaur from the Upper Jurassic Tiaojishan Formation of northern China

doi:10.7717/peerj.19664

IVPP-IR

	A new neornithischian dinosaur from the Upper Jurassic Tiaojishan Formation of northern China
	Yang, Yunfeng 1,2; King, James L.2,3,4; Xu, Xing2,5
	2025-07-11
发表期刊	PEERJ
ISSN	2167-8359
卷号	13 页码:57
通讯作者	Xu, Xing(xu.xing@ivpp.ac.cn)
摘要	The Middle and Late Jurassic Yanliao Biota is different from other contemporaneous fossil assemblages in that it lacks neornithischian dinosaurs. Here, we report a new, early-diverging neornithischian, Pulaosaurus qinglong gen. et sp. nov., from the Upper Jurassic Tiaojishan Formation of Qinglong, Hebei Province, of northern China. Diagnostic or noteworthy morphological characteristics of P. qinglong include: five premaxillary teeth; a small boss is present on the caudoventral corner of the dorsal ramus of the jugal; a nuchal crest is located along the parietal; the manus has five digits; a supra-acetabular crest is present on the ilium; the paired arytenoids are gracile and leaf-like in form; the obturator process along the ischium is located near the pubic peduncle; a notch-like shaped obturator opening is present within the pubis; a robust fibular condyle forms a dorsoventrally extending crest on the tibia; a subtriangular flange on the anterior surface of the astragalus extends dorsolaterally along three distal tarsals; three of the distal tarsals are unfused, including a small drop-shaped distal tarsal 3; distal tarsal 3 is pierced by a foramen. A phylogenetic analysis places P. qinglong as one of the earliest-diverging neornithischians yet described. Moreover, P. qinglong represents the second known dinosaur to preserve ossified laryngeal elements, thus suggesting that a bird-like vocalization evolved early in non-avian dinosaur evolution.
关键词	Yanliao biota Neornithischia Laryngeal elements
DOI	10.7717/peerj.19664
关键词[WOS]	JEHOLOSAURUS-SHANGYUANENSIS DINOSAURIA ; BASAL ORNITHOPOD DINOSAUR ; CHANGCHUNSAURUS-PARVUS ; CRANIAL ANATOMY ; JILIN PROVINCE ; YANLIAO BIOTA ; ORNITHISCHIA ; LARYNX ; MORPHOLOGY ; OSTEOLOGY
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001531274600001
出版者	PEERJ INC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/24493
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Xu, Xing
作者单位	1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 3.Colorado Northwestern Community Coll, Craig, CO USA 4.Univ Bristol, Sch Earth Sci, Bristol, England 5.Yunnan Univ, Ctr Vertebrate Evolutionary Biol, Kunming, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yunfeng,King, James L.,Xu, Xing. A new neornithischian dinosaur from the Upper Jurassic Tiaojishan Formation of northern China[J]. PEERJ,2025,13:57.
APA	Yang, Yunfeng,King, James L.,&Xu, Xing.(2025).A new neornithischian dinosaur from the Upper Jurassic Tiaojishan Formation of northern China.PEERJ,13,57.
MLA	Yang, Yunfeng,et al."A new neornithischian dinosaur from the Upper Jurassic Tiaojishan Formation of northern China".PEERJ 13(2025):57.