A NEW SPECIMEN OF THE TRITYLODONTID<i> BIENOTHEROIDES</i><i> ZIGONGENSIS</i> (CYNODONTIA, MAMMALIAMORPHA) FROM THE WUCAIWAN AREA OF XINJIANG, CHINA, AND PHYLOGENY OF TRITYLODONTIDAE

doi:10.5531/sd.sp.77

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	A NEW SPECIMEN OF THE TRITYLODONTID BIENOTHEROIDES ZIGONGENSIS (CYNODONTIA, MAMMALIAMORPHA) FROM THE WUCAIWAN AREA OF XINJIANG, CHINA, AND PHYLOGENY OF TRITYLODONTIDAE
	Ren, Jicheng 1,2; Liu, Lu 3; Han, Fenglu4 ; Xu, Xing1,5 ; Clark, James M.6; Liu, Jun1 ; Meng, Jin7,8 ; Mao, Fangyuan 1,8
	2025-10-09
发表期刊	BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY
ISSN	0003-0090
期号	477 页码:122
通讯作者	Ren, Jicheng()
摘要	Tritylodontidae is a Mesozoic group of small to medium-sized mammaliamorph cynodonts with cosmopolitan geographic distribution and characterized by possessing three mesiodistal rows of cusps in each of their upper postcanine teeth and two rows in the lower postcanines. Abundant tritylodontid materials have been discovered in Sichuan, Xinjiang, Yunnan, and other localities in China since 1938, but detailed description of their morphologies has been wanting. This paper describes a well-preserved tritylodontid skull with both mandibles, complete dentitions, and postdentary bones. The specimen was collected from the Upper Jurassic Shishugou Formation in the Wucaiwan area of Junggar Basin, Xinjiang, China. It is assigned to Bienotheroides zigongensis because it possesses a typical characteristic combination of B. zigongensis, such as an extremely deep zygomatic arch, a greatly reduced maxilla, upper postcanine cusp formula of 2-3-3 and a quadrate with a mediodorsally directed stapedial process. Using micro-CT scan data, we are able to create threedimensional digital reconstructions and provide a complete description of the specimen. We also reconstruct the inner ear and the maxillary canal system, which provide considerable craniodental information previously unknown in Bienotheroides. These new morphological data are informative for better diagnosing the genus and reconstructing the phylogeny of tritylodontids. A revised character data matrix with 15 tritylodontid genera and 70 characters is generated based on reevaluated morphological characters, of which 23 characters are new. Our phylogenetic analysis of Tritylodontidae resulted in a better-resolved topology of the phylogenetic relationship of tritylodontids. Using this phylogenetic framework, we postulate an evolutionary pattern of tritylodontid cranial morphology unique among cynodonts, characterized by shortening of the snout and basicranial region and reduction of the maxilla.
DOI	10.5531/sd.sp.77
关键词[WOS]	JURASSIC SHISHUGOU FORMATION ; JUNGGAR BASIN ; THERAPSIDS ; ORIGIN ; EUCYNODONTIA ; MORPHOLOGY ; DIVERSITY ; SYNAPSIDA ; REVEALS ; REPTILE
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[42122010] ; National Natural Science Foundation of China[42072002] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[Y2023017] ; Yunnan Revitalization Talent Support Program[202305AB350006]
项目资助者	National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Yunnan Revitalization Talent Support Program
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology
WOS记录号	WOS:001596440700001
出版者	AMER MUSEUM NATURAL HISTORY
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/24895
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Ren, Jicheng
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Nat Hist Museum China, Beijing, Peoples R China 4.China Univ Geosci, Sch Earth Sci, Wuhan, Peoples R China 5.Yunnan Univ, Ctr Vertebrate Evolutionary Biol, Kunming, Peoples R China 6.George Washington Univ, Dept Biol Sci, Washington, DC USA 7.Amer Museum Nat Hist, Div Paleontol, New York, NY USA 8.CUNY, Grad Ctr, Earth & Environm Sci, New York, NY USA
推荐引用方式 GB/T 7714	Ren, Jicheng,Liu, Lu,Han, Fenglu,et al. A NEW SPECIMEN OF THE TRITYLODONTID BIENOTHEROIDES ZIGONGENSIS (CYNODONTIA, MAMMALIAMORPHA) FROM THE WUCAIWAN AREA OF XINJIANG, CHINA, AND PHYLOGENY OF TRITYLODONTIDAE[J]. BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY,2025(477):122.
APA	Ren, Jicheng.,Liu, Lu.,Han, Fenglu.,Xu, Xing.,Clark, James M..,...&Mao, Fangyuan.(2025).A NEW SPECIMEN OF THE TRITYLODONTID BIENOTHEROIDES ZIGONGENSIS (CYNODONTIA, MAMMALIAMORPHA) FROM THE WUCAIWAN AREA OF XINJIANG, CHINA, AND PHYLOGENY OF TRITYLODONTIDAE.BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY(477),122.
MLA	Ren, Jicheng,et al."A NEW SPECIMEN OF THE TRITYLODONTID BIENOTHEROIDES ZIGONGENSIS (CYNODONTIA, MAMMALIAMORPHA) FROM THE WUCAIWAN AREA OF XINJIANG, CHINA, AND PHYLOGENY OF TRITYLODONTIDAE".BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY .477(2025):122.