A new Rattus species and its associated micromammals from the Pliocene Yangyi Formation in Baoshan, western Yunnan, China

doi:10.1080/02724634.2023.2249063

IVPP-IR

	A new Rattus species and its associated micromammals from the Pliocene Yangyi Formation in Baoshan, western Yunnan, China
	Chang, Meijing 1,2; Zhang, Chunxia 3; Ji, Xueping 4; Li, Qiang1,2 ; Ni, Xijun1,2
	2023-01-02
发表期刊	JOURNAL OF VERTEBRATE PALEONTOLOGY
ISSN	0272-4634
页码	15
通讯作者	Ni, Xijun()
摘要	Rattus (sensu stricto) is one of the groups of rodents and is most closely related to human activities. The diversity of extant Rattus species is the highest among rodents, but fossil species are rare, mainly found in Asia during the Late Pliocene to Early Pleistocene. Here, we described a Late Pliocene new species of Rattus based on material from the upper Yangyi Formation in Baoshan county, Yunnan Province, China. The primitive morphological characteristics of fewer molar roots, t12 preserved on M1-2, t9 preserved on M3, and buccal stylids well developed on lower molars indicate that the new Rattus is by far the most primitive form in the Rattus genus. In dental morphology of Rattus, the molars have an evolutionary trend of gradually increasing the number of roots and fusing cusps into an arched ridge, reduction to disappearance of the t7 and t12 on upper molars, and reduction to disappearance of the mesiocentral cusp on m1, the anterior buccal stylid on m1-3 and hypoconid on m3. Discovery of the new Rattus from Baoshan confirms that Rattus probably originated in southern Asia before the Late Pliocene, and also provides new fossil evidence to calibrate the molecular clock of the divergence of Rattus from other murines. In addition, we also reported five associated small mammals: Neotetracus sp. nov., Anourosorex qianensis, Soricidae gen. et sp. indet., Ia io, and Kowalskia sp. Most of them inhabit warm and humid tropical or subtropical montane forests or shrubland environments. The composition of this mammalian assemblage indicates that the paleoelevation and paleoclimate of Baoshan area in the Pliocene are very similar to those of the present.
DOI	10.1080/02724634.2023.2249063
关键词[WOS]	HOMINOID LOCALITY ; LATE MIOCENE ; GENUS ; MAMMALIA ; FAUNA ; RECONSTRUCTION ; COLONIZATION ; PLEISTOCENE ; RODENTIA ; MURINAE
收录类别	SCI
语种	英语
资助项目	We thank Y. M. Hou from the IVPP for his help with the CT-scans and X. C. Zhu from the IOZ for assistance with extant specimen examination at the National Animal Collection Resource Center. Yu Ji screen-washed the fossilif[42072209] ; We thank Y. M. Hou from the IVPP for his help with the CT-scans and X. C. Zhu from the IOZ for assistance with extant specimen examination at the National Animal Collection Resource Center. Yu Ji screen-washed the fossilif[41888101] ; We thank Y. M. Hou from the IVPP for his help with the CT-scans and X. C. Zhu from the IOZ for assistance with extant specimen examination at the National Animal Collection Resource Center. Yu Ji screen-washed the fossilif[41988101] ; We thank Y. M. Hou from the IVPP for his help with the CT-scans and X. C. Zhu from the IOZ for assistance with extant specimen examination at the National Animal Collection Resource Center. Yu Ji screen-washed the fossilif[41625005] ; National Natural Science Foundation of China[2019QZKK0705] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[XDB26000000] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[XDA20070203] ; Strategic Priority Research Program of Chinese Academy of Sciences
项目资助者	We thank Y. M. Hou from the IVPP for his help with the CT-scans and X. C. Zhu from the IOZ for assistance with extant specimen examination at the National Animal Collection Resource Center. Yu Ji screen-washed the fossilif ; National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Strategic Priority Research Program of Chinese Academy of Sciences
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:001085783200001
出版者	TAYLOR & FRANCIS INC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/22949
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Ni, Xijun
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Kunming Inst Zool, Kunming Nat Hist Museum Zool, Kunming 650201, Peoples R China
推荐引用方式 GB/T 7714	Chang, Meijing,Zhang, Chunxia,Ji, Xueping,et al. A new Rattus species and its associated micromammals from the Pliocene Yangyi Formation in Baoshan, western Yunnan, China[J]. JOURNAL OF VERTEBRATE PALEONTOLOGY,2023:15.
APA	Chang, Meijing,Zhang, Chunxia,Ji, Xueping,Li, Qiang,&Ni, Xijun.(2023).A new Rattus species and its associated micromammals from the Pliocene Yangyi Formation in Baoshan, western Yunnan, China.JOURNAL OF VERTEBRATE PALEONTOLOGY,15.
MLA	Chang, Meijing,et al."A new Rattus species and its associated micromammals from the Pliocene Yangyi Formation in Baoshan, western Yunnan, China".JOURNAL OF VERTEBRATE PALEONTOLOGY (2023):15.