KMS Institute of Vertebrate Paleontology and Paleoanthropology
| FIRST SUBADULT SPECIMEN OF PSEPHOCHELYS POLYOSTEODERMA (SAUROPTERYGIA, PLACODONTIA) IMPLIES TURTLE-LIKE FUSION PATTERN OF THE CARAPACE | |
Wang, Wei1,2; Ma, Feimin3; Li, Chun1
| |
| 2019-12-23 | |
| 发表期刊 | PAPERS IN PALAEONTOLOGY
 |
| ISSN | 2056-2799 |
| 卷号 | 6期号:2页码:14 |
| 摘要 | Placodonts are a group of turtle-like animals, including placochelyids that are restricted entirely to the Triassic Tethyan realm. Their fossil remains are rare compared with other contemporaneous marine reptiles. Here, we report the first subadult specimen of the placochelyid Psephochelys polyosteoderma from south-western China. It is the most complete specimen of this taxon known. The new fossil is referred confidently to Psephochelys polyosteoderma on the basis of the narrow and spatulate rostrum, toothless premaxiliac, and carapace composed of small and numerous armour plates with relatively smooth surfaces. The new specimen provides additional anatomical information for Psephochelys polyosteoderma including the presence of transverse processes on the dorsal vertebrae lacking anteroposterior expansion, and a phalangeal formula in the pes of 1-2-3-4-2. The phylogeny of placodonts, especially the family Placochelyidae, is revised based on a character matrix incorporating additional postcranial characters. This resulted in a betterresolved tree when compared with previous studies, with Psephochelys as a derived genus within Placochelyidae. On comparison with the adult holotype specimen, the incompletely developed armour in the new specimen reveals a fusion pattern of the carapace beginning with the axial and marginal regions. This surface fusion pattern resembles the ontogenetic process in the embryonic turtle shell, hinting at a possible deep homology with their common diapsid ancestor. |
| 关键词 | Placodontia Triassic Placochelyidae Psephochelys polyosteoderma carapace |
| DOI | 10.1002/spp2.1293 |
| 关键词[WOS] | TRIASSIC STEM-TURTLE ; PHYLOGENY ; GUIZHOU ; EVOLUTION ; REPTILIA ; CHINA |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Chinese Academy of Sciences[XDB26000000] ; National Natural Science Foundation of China (NSFC)[41772006] ; University of Chinese Academy of Sciences Joint PhD Training Program[UCAS [2015]37] |
| WOS研究方向 | Paleontology |
| WOS类目 | Paleontology |
| WOS记录号 | WOS:000504205500001 |
| 出版者 | WILEY |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.205/handle/311034/16846 |
| 专题 | 中科院古脊椎所（2000年以后） |
| 通讯作者 | Wang, Wei |
| 作者单位 | 1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, CAS Ctr Excellence Life & Paleoenvironm, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 3.Erenhot Museum, Nei Mongol 011199, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Wei,Ma, Feimin,Li, Chun. FIRST SUBADULT SPECIMEN OF PSEPHOCHELYS POLYOSTEODERMA (SAUROPTERYGIA, PLACODONTIA) IMPLIES TURTLE-LIKE FUSION PATTERN OF THE CARAPACE[J]. PAPERS IN PALAEONTOLOGY,2019,6(2):14. |
| APA | Wang, Wei,Ma, Feimin,&Li, Chun.(2019).FIRST SUBADULT SPECIMEN OF PSEPHOCHELYS POLYOSTEODERMA (SAUROPTERYGIA, PLACODONTIA) IMPLIES TURTLE-LIKE FUSION PATTERN OF THE CARAPACE.PAPERS IN PALAEONTOLOGY,6(2),14. |
| MLA | Wang, Wei,et al."FIRST SUBADULT SPECIMEN OF PSEPHOCHELYS POLYOSTEODERMA (SAUROPTERYGIA, PLACODONTIA) IMPLIES TURTLE-LIKE FUSION PATTERN OF THE CARAPACE".PAPERS IN PALAEONTOLOGY 6.2(2019):14. |
| 条目包含的文件 | 下载所有文件 | |||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Papers in Palaeontol（7898KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论