KMS Institute of Vertebrate Paleontology and Paleoanthropology
| New material of the trechnotherian mammal Lactodens from the Early Cretaceous Jehol Biota: Comparison with Origolestes and implications for mammal evolution | |
Mao, Fangyuan1,2; Liu, Cunyu3; Meng, Jin2,4
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| 2022 | |
| 发表期刊 | ACTA PALAEONTOLOGICA POLONICA
 |
| ISSN | 0567-7920 |
| 卷号 | 67期号:1页码:135-153 |
| 摘要 | A new specimen of Lactodens sheni, the only known spalacolestine from the Early Cretaceous Jehol Biota, is reported from the Jiufotang Formation, Liaoning, China. The description focuses on the dental and mandibular morphologies from both the new specimen and the holotype, particularly those that were unknown or poorly known from the holotype when the taxon was established. As revealed primarily by high-resolution computed tomography, morphologies and size gradient of the lower molars and detailed features of the mandibles, such as the masseteric foramen, can be unequivo-cally described. The dental and mandibular morphologies ofLactodens are compared with those of Origolestes lii, also from the Jehol Biota; these two taxa represent by far the best specimens in Spalacotheriidae and Zhangheotheriidae, respectively, and could be used as the representatives of their own groups in future higher-level phylogenetic analysis of mammals. The two taxa display considerable differences in dental and mandibular features, probably indicating a deeper split of spalacotheriids and zhangheotheriids than previously thought. Absence of the Meckelian groove in Lactodens, contrasting to the distinct one that holds a sizable Meckel's cartilage in adult Origolestes, suggests an independent evo-lution of the definitive mammalian middle ear within "symmetrodontans". The morphological gradient in the tooth row and association of the upper and lower dentitions from the same individual animal are also instructive for interpreting molar variations and evolution in "symmetrodontans" and mammals. |
| 关键词 | Mammalia Symmetrodonta Spalacotheriidae Zhangheotheriidae dental morphology mandible middle ear Cretaceous Yixian Formation China |
| DOI | 10.4202/app.00918.2021 |
| 关键词[WOS] | OSSIFIED MECKELS CARTILAGE ; MESOZOIC MAMMALIA ; EUTHERIAN MAMMALS ; WESTERN SIBERIA ; MIDDLE-EAR ; LOWER JAW ; SYMMETRODONT ; PHYLOGENY ; ORIGIN ; DIVERSITY |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41688103] ; National Natural Science Foundation of China[41404022] ; National Natural Science Foundation of China[41404022] ; Kalbfleisch Fellowship, Richard Gilder Graduate School, American Museum of Natural History ; Kalbfleisch Fellowship, Richard Gilder Graduate School, American Museum of Natural History ; Youth Innovation Promotion Association CAS[2019076] ; Youth Innovation Promotion Association CAS[2019076] |
| WOS研究方向 | Paleontology |
| WOS类目 | Paleontology |
| WOS记录号 | WOS:000779625700011 |
| 出版者 | INST PALEOBIOLOGII PAN |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/21426 |
| 专题 | 中科院古脊椎所（2000年以后） |
| 通讯作者 | Meng, Jin |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Evolutionary Systemat Vertebrates, Beijing 100044, Peoples R China 2.Amer Museum Nat Hist, Div Paleontol, New York, NY 10024 USA 3.Beipiao Pterosaur Museum China, Beipiao County 122100, Liaoning, Peoples R China 4.CUNY, Earth & Environm Sci, Grad Ctr, New York, NY 10016 USA |
| 推荐引用方式 GB/T 7714 | Mao, Fangyuan,Liu, Cunyu,Meng, Jin. New material of the trechnotherian mammal Lactodens from the Early Cretaceous Jehol Biota: Comparison with Origolestes and implications for mammal evolution[J]. ACTA PALAEONTOLOGICA POLONICA,2022,67(1):135-153. |
| APA | Mao, Fangyuan,Liu, Cunyu,&Meng, Jin.(2022).New material of the trechnotherian mammal Lactodens from the Early Cretaceous Jehol Biota: Comparison with Origolestes and implications for mammal evolution.ACTA PALAEONTOLOGICA POLONICA,67(1),135-153. |
| MLA | Mao, Fangyuan,et al."New material of the trechnotherian mammal Lactodens from the Early Cretaceous Jehol Biota: Comparison with Origolestes and implications for mammal evolution".ACTA PALAEONTOLOGICA POLONICA 67.1(2022):135-153. |
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