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A new mammal from the Lower Cretaceous Jehol Biota and implications for eutherian evolution
Wang, Hai-Bing1,2,3; Hoffmann, Simone4; Wang, Dian-Can5; Wang, Yuan-Qing1,2,6
2022-03-28
Source PublicationPHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
ISSN0962-8436
Volume377Issue:1847Pages:11
Abstract

Here we report on a new Early Cretaceous eutherian represented by a partial skeleton from the Jiufotang Formation at Sihedang site, Lingyuan City, Liaoning Province that fills a crucial gap between the earliest eutherians from the Yixian Formation and later Cretaceous eutherians. The new specimen reveals, to our knowledge for the first time in eutherians, that the Meckelian cartilage was ossified but reduced in size, confirming a complete detachment of the middle ear from the lower jaw. Seven hyoid elements, including paired stylohyals, epihyals and thyrohyals and the single basihyal are preserved. For the inner ear the ossified primary lamina, base of the secondary lamina, ossified cochlear ganglion and secondary crus commune are present and the cochlear canal is coiled through 360 degrees. In addition, plesiomorphic features of the dentition include weak conules, lack of pre- and post-cingula and less expanded protocones on the upper molars and height differential between the trigonid and talonid, a large protoconid and a small paraconid on the lower molars. The new taxon displays an alternating pattern of tooth replacement with P3 being the last upper premolar to erupt similar to the basal eutherian Juramaia. Parsimony analysis places the new taxon with Montanalestes, Sinodelphys and Ambolestes as a sister group to other eutherians. This article is part of the theme issue 'The impact of Chinese palaeontology on evolutionary research'.

KeywordEarly Cretaceous Jehol Biota Eutheria Meckelian cartilage inner ear tooth replacement
DOI10.1098/rstb.2021.0042
Indexed BySCI
Language英语
WOS KeywordMIDDLE-EAR ; INNER-EAR ; MORPHOLOGY ; PHYLOGENY ; PETROSAL ; SKULL
Funding ProjectStrategic Priority Research Programme of the Chinese Academy of Sciences[XDB26000000] ; Strategic Priority Research Programme of the Chinese Academy of Sciences[XDB18000000] ; Youth Innovation Promotion Association, CAS ; National Natural Science Foundation of China[41802005] ; National Natural Science Foundation of China[41688103] ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)[183121]
WOS Research AreaLife Sciences & Biomedicine - Other Topics
WOS SubjectBiology
WOS IDWOS:000751802600005
Funding OrganizationStrategic Priority Research Programme of the Chinese Academy of Sciences ; Youth Innovation Promotion Association, CAS ; National Natural Science Foundation of China ; State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, CAS)
PublisherROYAL SOC
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/40451
Collection中国科学院南京地质古生物研究所
Corresponding AuthorWang, Hai-Bing
Affiliation1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironment, Beijing, Peoples R China
3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Key State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China
4.New York Inst Technol, Dept Anat, Coll Osteopath Med, Old Westbury, NY USA
5.Peking Univ, Dept Oral & Maxillofacial Surg, Sch Stomatol, 22 South Zhongguancun Ave, Beijing, Peoples R China
6.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Hai-Bing,Hoffmann, Simone,Wang, Dian-Can,et al. A new mammal from the Lower Cretaceous Jehol Biota and implications for eutherian evolution[J]. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,2022,377(1847):11.
APA Wang, Hai-Bing,Hoffmann, Simone,Wang, Dian-Can,&Wang, Yuan-Qing.(2022).A new mammal from the Lower Cretaceous Jehol Biota and implications for eutherian evolution.PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,377(1847),11.
MLA Wang, Hai-Bing,et al."A new mammal from the Lower Cretaceous Jehol Biota and implications for eutherian evolution".PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 377.1847(2022):11.
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