EOCENE PACHYNOLOPHINAE (PERISSODACTYLA, PALAEOTHERIIDAE) FROM CHINA, AND THEIR PALAEOBIOGEOGRAPHICAL IMPLICATIONS

doi:10.1111/pala.12319

	EOCENE PACHYNOLOPHINAE (PERISSODACTYLA, PALAEOTHERIIDAE) FROM CHINA, AND THEIR PALAEOBIOGEOGRAPHICAL IMPLICATIONS
	Bai, Bin 1,2
刊名	PALAEONTOLOGY
	2017-11-01
卷号	60 期号:6 页码:837-852
关键词	Palaeotheriidae Pachynolophinae Lophiohippus Qianohippus phylogeny palaeobiogeography
ISSN号	0031-0239
DOI	10.1111/pala.12319
英文摘要	The Eocene perissodactyl family Palaeotheriidae has traditionally been considered to be a nearly endemic European group within Equoidea, but a few palaeotheres have been reported from Asia. Here, I reanalyse a maxilla containing M1-3 from the Lunan Basin, Yunnan Province, China. This element was initially assigned to a new tapiromorph species, Lophialetes yunnanensis, but is here placed in a new genus Lophiohippus within Pachynolophinae based mainly on the absence of mesostyles, the strongly oblique metalophs, the strong development of lophodonty, parastyles overlapping metastyles of preceding teeth and situated mesial to the paracone, and the fact that M3 is longer than wide and has a large and buccally deflected metastyle. Lophiohippus differs from European Anchilophus and Paranchilophus in that the parastyles are situated mesial or even slightly lingual, rather than mesiobuccal, to the paracones, and M3 is markedly relatively larger than M1. I further reanalyse Qianohippus magicus from the Shinao Basin of Guizhou Province, China, in which the complete dentition is known. Qianohippus is characterized by a molariform P2 and non-molariform P3-4; a relatively high degree of lophodonty; the absence of mesostyles; an angular bending in the protoloph on P3-M3 and the metaloph on M1-3 at the paraconule and metaconule, respectively; and weakly developed metastylid' on the lower cheek teeth. A cladistic analysis supports a close relationship between Lophiohippus yunnanensis and Paranchilophus, and suggests that Qianohippus is closely related to some derived pachynolophs. The appearance of the pachynolophins Lophiohippus and Qianohippus in China supports the existence of a biogeographical connection between Europe and Asia in the Middle-Late Eocene, and the dispersal route was probably along the Tethyan microcontinents in the south.
资助项目	China Scholarship Council ; National Natural Science Foundation of China[41672014] ; National Natural Science Foundation of China[41572021] ; National Natural Science Foundation of China[41002009] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[163103] ; Youth Innovation Promotion Association CAS
WOS关键词	WESTERN INDIA ; PHYLOGENETIC ANALYSIS ; MIDDLE EOCENE ; MAMMALIA ; ASIA ; RADIATION ; ORIGIN ; PALEOCENE ; TILLODONT ; GONDWANA
WOS研究方向	Paleontology
语种	英语
出版者	WILEY
WOS记录号	WOS:000412405100006
资助机构	China Scholarship Council ; National Natural Science Foundation of China ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS) ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/18937]
专题	中国科学院南京地质古生物研究所
通讯作者	Bai, Bin
作者单位	1.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China 2.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Bai, Bin. EOCENE PACHYNOLOPHINAE (PERISSODACTYLA, PALAEOTHERIIDAE) FROM CHINA, AND THEIR PALAEOBIOGEOGRAPHICAL IMPLICATIONS[J]. PALAEONTOLOGY,2017,60(6):837-852.
APA	Bai, Bin.(2017).EOCENE PACHYNOLOPHINAE (PERISSODACTYLA, PALAEOTHERIIDAE) FROM CHINA, AND THEIR PALAEOBIOGEOGRAPHICAL IMPLICATIONS.PALAEONTOLOGY,60(6),837-852.
MLA	Bai, Bin."EOCENE PACHYNOLOPHINAE (PERISSODACTYLA, PALAEOTHERIIDAE) FROM CHINA, AND THEIR PALAEOBIOGEOGRAPHICAL IMPLICATIONS".PALAEONTOLOGY 60.6(2017):837-852.