Anatomy of the Critically-Endangered Anji Salamander (<i>Hynobius amjiensis</i>) Provides New Insights Into Morphological Evolution of Salamanders

doi:10.1002/jmor.70028

IVPP-IR

	*Anatomy of the Critically-Endangered Anji Salamander (Hynobius amjiensis) Provides New Insights Into Morphological Evolution of Salamanders*
	Chen, Cang-Song 1; Jia, Jia 2; Wang, Xian-Ting 3; Yang, Jia 1; Gao, Ke-Qin 4
	2025-02-01
发表期刊	JOURNAL OF MORPHOLOGY
ISSN	0362-2525
卷号	286 期号:2 页码:11
通讯作者	Jia, Jia(jiajia@ivpp.ac.cn) ; Gao, Ke-Qin(kqgao@pku.edu.cn)
摘要	The Anji Salamander (Hynobius amjiensis) is a critically-endangered amphibian endemic to the Tianmushan Mountain area in southeastern China. As most of its congeneric species in the ancestral salamander family Hynobiidae, the osteology of H. amjiensis has remained essentially unknown and has hampered efforts in understanding morphological evolutionary patterns of early salamanders. Here, we investigate the skeletal anatomy of H. amjiensis based on microcomputed tomography scans of post-metamorphosed juvenile and adult specimens. Our results reveal Hynobiidae has more early-tetrapod-like plesiomorphic characters than expected, as H. amjiensis has a stapedial foramen in the middle ear and two centralia and a centrale-radius contact in the limb. We demonstrate that Hynobius amjiensis is the first known living salamander species with a stapedial foramen whose absence was believed to unite salamanders and anurans, and hence opens major questions on the evolution of the middle ear in modern amphibians: if some salamanders and caecilians had a stapedial foramen inherited from their common ancestor, when and how many times was the foramen lost independently in modern amphibians, and how did this structural loss impact the phylogenetic evolution of salamander clades? Our findings of hyper-ossified pectoral and pelvic girdles and loss of postminimus in the pes in H. amjiensis demonstrate that functional morphological features in hynobiids are potentially informative in phylogeny and ontogeny of early salamanders.
关键词	anatomy critically-endangered species Hynobius amjiensis middle ear ontogeny and phylogeny
DOI	10.1002/jmor.70028
关键词[WOS]	CAUDATA HYNOBIIDAE ; COLUMELLA AURIS ; PHYLOGENY ; AMPHIBIA ; APPARATUS
收录类别	SCI
语种	英语
资助项目	This research was supported by the National Natural Science Foundation of China (NSFC 41872008, 41702002) and the Natural Science Foundation of Zhejiang (LTGS23C030003 and LGN19C040002).[NSFC 41872008] ; This research was supported by the National Natural Science Foundation of China (NSFC 41872008, 41702002) and the Natural Science Foundation of Zhejiang (LTGS23C030003 and LGN19C040002).[41702002] ; National Natural Science Foundation of China[LTGS23C030003] ; National Natural Science Foundation of China[LGN19C040002] ; Natural Science Foundation of Zhejiang
项目资助者	This research was supported by the National Natural Science Foundation of China (NSFC 41872008, 41702002) and the Natural Science Foundation of Zhejiang (LTGS23C030003 and LGN19C040002). ; National Natural Science Foundation of China ; Natural Science Foundation of Zhejiang
WOS研究方向	Anatomy & Morphology
WOS类目	Anatomy & Morphology
WOS记录号	WOS:001408660700001
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/311034/24265
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Jia, Jia; Gao, Ke-Qin
作者单位	1.Zhejiang Museum Nat Hist, Hangzhou, Zhejiang, Peoples R China 2.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China 3.Anji Salamander Natl Nat Reserve Management Ctr, Huzhou, Zhejiang, Peoples R China 4.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chen, Cang-Song,Jia, Jia,Wang, Xian-Ting,et al. Anatomy of the Critically-Endangered Anji Salamander (Hynobius amjiensis) Provides New Insights Into Morphological Evolution of Salamanders[J]. JOURNAL OF MORPHOLOGY,2025,286(2):11.
APA	Chen, Cang-Song,Jia, Jia,Wang, Xian-Ting,Yang, Jia,&Gao, Ke-Qin.(2025).Anatomy of the Critically-Endangered Anji Salamander (Hynobius amjiensis) Provides New Insights Into Morphological Evolution of Salamanders.JOURNAL OF MORPHOLOGY,286(2),11.
MLA	Chen, Cang-Song,et al."Anatomy of the Critically-Endangered Anji Salamander (Hynobius amjiensis) Provides New Insights Into Morphological Evolution of Salamanders".JOURNAL OF MORPHOLOGY 286.2(2025):11.