IGGCAS OpenIR  > 岩石圈演化国家重点实验室
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
Source PublicationPAPERS IN PALAEONTOLOGY
ISSN2056-2799
Pages14
AbstractPlacodonts 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.
KeywordPlacodontia Triassic Placochelyidae Psephochelys polyosteoderma carapace
DOI10.1002/spp2.1293
Funding OrganizationChinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program
WOS KeywordTRIASSIC STEM-TURTLE ; PHYLOGENY ; GUIZHOU ; EVOLUTION ; REPTILIA ; CHINA
Language英语
Funding ProjectChinese 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]
Funding OrganizationChinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program ; University of Chinese Academy of Sciences Joint PhD Training Program
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000504205500001
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95865
Collection岩石圈演化国家重点实验室
Corresponding AuthorWang, Wei
Affiliation1.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
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
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,2019:14.
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,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 (2019):14.
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