KMS Nanjing Institute of Geology and Palaeonotology,CAS
A previously undescribed specimen reveals new information on the dentition of Sapeornis chaoyangensis | |
Wang, Y1,2; Hu, H3,4; O'Connor, JMK3; Wang, M3; Xu, X3; Zhou, ZH3; Wang, XL1; Zheng, XT1 | |
2017-06 | |
发表期刊 | CRETACEOUS RESEARCH |
ISSN | 0195-6671 |
卷号 | 74页码:1-10 |
摘要 | Here we describe the well-preserved skull of a juvenile specimen of Sapeornis, STM 16-18. Only the tail and hindlimb plumage of this specimen have been previously described. It preserves what we consider to be the complete dentition of Sapeornis with four premaxillary teeth, three maxillary teeth and two tiny dentary teeth on each side, the latter feature being previously unknown for this taxon. Based on a study of 71 specimens of Sapeornis preserving dentition, we infer the absence of dentary teeth in previously described specimens of Sapeornis is taphonomic, and consider the true dental formula of Sapeornis to be 4-3-2 (premaxillary teeth number-maxillary teeth number-dentary teeth number). Rostral to the dentary teeth, STM 16-18 preserves three shallow, empty aveoli. We hypothesize that this morphology captures an early stage in dental reduction and indicates that in at least some avian lineages, the loss of teeth was gradual. (C) 2016 Elsevier Ltd. All rights reserved. |
关键词 | Sapeornis Dentition Dental Reduction Liaoning Early Cretaceous |
DOI | 10.1016/j.cretres.2016.12.012 |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Geology ; Paleontology |
WOS类目 | Geology ; Paleontology |
WOS记录号 | WOS:000400215200001 |
出版者 | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD |
文献类型 | 期刊论文 |
条目标识符 | http://ir.nigpas.ac.cn/handle/332004/13629 |
专题 | 中国科学院南京地质古生物研究所 |
作者单位 | 1.Linyi Univ, Inst Geol & Paleontol, Linyi 276000, Shandong, Peoples R China; 2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China; 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, 142 Xizhimenwai St, Beijing 100044, Peoples R China; 4.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China |
第一作者单位 | 中国科学院南京地质古生物研究所 |
推荐引用方式 GB/T 7714 | Wang, Y,Hu, H,O'Connor, JMK,et al. A previously undescribed specimen reveals new information on the dentition of Sapeornis chaoyangensis[J]. CRETACEOUS RESEARCH,2017,74:1-10. |
APA | Wang, Y.,Hu, H.,O'Connor, JMK.,Wang, M.,Xu, X.,...&Zheng, XT.(2017).A previously undescribed specimen reveals new information on the dentition of Sapeornis chaoyangensis.CRETACEOUS RESEARCH,74,1-10. |
MLA | Wang, Y,et al."A previously undescribed specimen reveals new information on the dentition of Sapeornis chaoyangensis".CRETACEOUS RESEARCH 74(2017):1-10. |
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