A juvenile skull from the early Palaeocene of China extends the appearance of crocodyloids in Asia back by 15-20 million years

doi:10.1093/zoolinnean/zlac067

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	A juvenile skull from the early Palaeocene of China extends the appearance of crocodyloids in Asia back by 15-20 million years
	Boerman, Sophie A.; Perrichon, Gwendal ; Yang, Jian ; Li, Cheng-Sen ; Martin, Jeremy E.; Speijer, Robert P.; Smith, Thierry 7
刊名	ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
	2023
卷号	197 期号:3 页码:787-811
关键词	biogeography Crocodylia Crocodyloidea fossil phylogeny
ISSN号	0024-4082
DOI	10.1093/zoolinnean/zlac067
文献子类	Article
英文摘要	The earliest Crocodylia from Asia have been represented so far only by alligatoroids and planocraniids. Although definitive crocodyloids are not known until the late Eocene, it has been hypothesized that Asiatosuchus-like basal crocodyloids originated in Asia before the late Palaeocene. In this paper, we describe a new fossil crocodyloid from the lower Palaeocene of Qianshan Basin, Anhui Province, China. The skull and lower jaw fragment exhibit several characteristics typical of juvenile crocodylians. They also display a combination of features not seen in any other taxon, warranting the erection of a new species and genus, Qianshanosuchus youngi gen. & sp. nov. Its affinities are tested in phylogenetic analyses based on two recent character matrices of Eusuchia. To assess the effect of juvenile characteristics on the outcome of the phylogenetic analyses, juvenile specimens of extant crocodylian taxa are analysed in the same way, showing that the effect of their ontogenetic stage on their placement in the tree is minimal. Our analyses point to a basal crocodyloid position for Q. youngi. With these findings, the presence of Crocodyloidea in Asia is extended to the early Palaeocene, 15-20 Myr earlier than formerly thought. Furthermore, our results corroborate previous hypotheses of a Palaeocene dispersal route of Asiatosuchus-like crocodyloids from Asia into Europe.
学科主题	Zoology
电子版国际标准刊号	1096-3642
出版地	OXFORD
WOS关键词	PHYLOGENETIC-RELATIONSHIPS ; MISSING DATA ; EOCENE ; PALEOGENE ; EUSUCHIA ; ASIATOSUCHUS ; REASSESSMENT ; STRATIGRAPHY ; BIOGEOGRAPHY ; MORPHOLOGY
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000862038500001
资助机构	Chinese Ministry of Science and Technology [2009DFA32210] ; Belgian Federal Science Policy Office [BL/36/C54]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/29118]
专题	系统与进化植物学国家重点实验室
作者单位	1.Speijer, Robert P.] Katholieke Univ Leuven, Dept Earth & Environm Sci, B-3001 Leuven, Belgium 2.Royal Belgian Inst Nat Sci, Directorate Earth & Hist Life, 29 Rue Vautier, B-1000 Brussels, Belgium 3.[Perrichon, Gwendal 4.Martin, Jeremy E.] Univ Claude Bernard Lyon 1, Lab Geol Lyon Terre Planetes & Environm, UMR 5276, Univ Lyon,CNRS,ENS Lyon, 46 Allee Italie, F-69342 Lyon, France 5.[Yang, Jian 6.Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China 7.[Boerman, Sophie A.
推荐引用方式 GB/T 7714	Boerman, Sophie A.,Perrichon, Gwendal,Yang, Jian,et al. A juvenile skull from the early Palaeocene of China extends the appearance of crocodyloids in Asia back by 15-20 million years[J]. ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY,2023,197(3):787-811.
APA	Boerman, Sophie A..,Perrichon, Gwendal.,Yang, Jian.,Li, Cheng-Sen.,Martin, Jeremy E..,...&Smith, Thierry.(2023).A juvenile skull from the early Palaeocene of China extends the appearance of crocodyloids in Asia back by 15-20 million years.ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY,197(3),787-811.
MLA	Boerman, Sophie A.,et al."A juvenile skull from the early Palaeocene of China extends the appearance of crocodyloids in Asia back by 15-20 million years".ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY 197.3(2023):787-811.