A new hupehsuchian (Reptilia: Ichthyosauromorpha) with widely spaced autopodium from the marine Lower Triassic of South China

doi:10.1080/14772019.2025.2560884

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	A new hupehsuchian (Reptilia: Ichthyosauromorpha) with widely spaced autopodium from the marine Lower Triassic of South China
	Qiao, Yu 1,2,3; Iijima, Masaya 4,5; Liu, Jun2
	2025-12-31
发表期刊	JOURNAL OF SYSTEMATIC PALAEONTOLOGY
ISSN	1477-2019
卷号	23 期号:1 页码:8
通讯作者	Liu, Jun(junliu@hfut.edu.cn)
摘要	Hupehsuchia is a group of marine reptiles from the uppermost Lower Triassic of South China, known for their segmented neural spines covered by dermal ossicles and polydactyl forelimbs. Although five genera and species are currently known for this group, our understanding of their true diversity is limited. In this study, we report a new hupehsuchian, Lentamanusuchus hubeiensis gen. et sp. nov., based on the combination of unique characters in the trunk region and forelimb. These include widely spaced autopodial elements, an extra distal carpal and metacarpal, and a two-layered dermal armour. Phylogenetic analysis recovered the new species as a sister taxon to Parahupehsuchinae within Hupehsuchidae, supporting the gradual addition of extra carpal and digital elements in hupehsuchians. The widely spaced autopodia of Lentamanusuchus hubeiensis represent previously unknown morphologies in hupehsuchians. The wide spacing of the proximal autopodia, along with hyperphalangy, may help smooth the paddle surface to reduce vortices during wrist and proximal digit flexion and extension while swimming. Alternatively, it could result from reduced ossification of manual elements due to diminished muscular control in the manus.https://zoobank.org/urn:lsid:zoobank.org:pub:32503E51-083A-482D-AEFF-4015621A6870
关键词	convergent evolution marine reptiles aquatic adaptation cetaceans
DOI	10.1080/14772019.2025.2560884
关键词[WOS]	EVOLUTION ; LIMB
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China ; Natural Science Foundation of Anhui Province[2408085J022] ; Basic Research Support Program for Excellent Young Teachers in Provincial Undergraduate Universities in Heilongjiang Province[YQJH2024048] ; [42172026] ; [41772003]
项目资助者	National Natural Science Foundation of China ; Natural Science Foundation of Anhui Province ; Basic Research Support Program for Excellent Young Teachers in Provincial Undergraduate Universities in Heilongjiang Province
WOS研究方向	Evolutionary Biology ; Paleontology
WOS类目	Evolutionary Biology ; Paleontology
WOS记录号	WOS:001588494900001
出版者	TAYLOR & FRANCIS LTD
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/24926
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Liu, Jun
作者单位	1.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 2.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China 3.Northeast Petr Univ, Sch Earth Sci, State Key Lab Continental Shale Oil, Daqing 163318, Heilongjiang, Peoples R China 4.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 5.Univ Tokyo, Grad Sch Frontier Sci, Dept Nat Environm Studies, Kashiwa 2770882, Japan
推荐引用方式 GB/T 7714	Qiao, Yu,Iijima, Masaya,Liu, Jun. A new hupehsuchian (Reptilia: Ichthyosauromorpha) with widely spaced autopodium from the marine Lower Triassic of South China[J]. JOURNAL OF SYSTEMATIC PALAEONTOLOGY,2025,23(1):8.
APA	Qiao, Yu,Iijima, Masaya,&Liu, Jun.(2025).A new hupehsuchian (Reptilia: Ichthyosauromorpha) with widely spaced autopodium from the marine Lower Triassic of South China.JOURNAL OF SYSTEMATIC PALAEONTOLOGY,23(1),8.
MLA	Qiao, Yu,et al."A new hupehsuchian (Reptilia: Ichthyosauromorpha) with widely spaced autopodium from the marine Lower Triassic of South China".JOURNAL OF SYSTEMATIC PALAEONTOLOGY 23.1(2025):8.