The shoulder girdle of early chondrichthyans grew by skeletal remodelling

doi:10.1098/rsbl.2025.0411

IVPP-IR

	The shoulder girdle of early chondrichthyans grew by skeletal remodelling
	Andreev, Plamen S.1,2,3; Zhu, Min4,5,6 ; Brakenhoff, Lars 2; Li, Qiang1,4 ; Zhao, Wenjin 4,5,6; Peng, Lijian 1; Marone, Federica 7; Dearden, Richard P.2,3; Rucklin, Martin 2,8
	2025-09-24
发表期刊	BIOLOGY LETTERS
ISSN	1744-9561
卷号	21 期号:9 页码:8
通讯作者	Andreev, Plamen S.(p.andreev.1@bham.ac.uk)
摘要	A distinct shoulder region, defined by endoskeletal and dermal girdles and associated pectoral musculature, is a major evolutionary adaptation of jawed vertebrates. In teleost model species, the large (macromeric) pectoral dermal bones can be derived from multiple embryonic tissues, identifying the shoulder of osteichthyans as a developmentally complex area at the head-trunk boundary. The absence of bone in living chondrichthyans makes Palaeozoic stem groups capable of dermal ossification key to understanding the underpinnings of skeletal growth in the shoulder of crown gnathostomes (osteichthyans and chondrichthyans). Here, using synchrotron X-ray tomography we demonstrate that individual pectoral plates in the oldest unequivocal jawed vertebrate, the Silurian (c. 439 Mya) chondrichthyan Fanjingshania renovata, develop from five separate growth centres. These centres correspond to pectoral bony spines that fuse neighbouring dermal scales into a pinnal plate and their expansion is accompanied by cyclical resorption and remodelling of bone and dentine. Our phylogenetic analyses support an interpretation of these processes as crown and stem gnathostome characters that co-occur only in the shoulder girdle of stem chondrichthyans. The systematic hard tissue remodelling in Fanjingshania reveals an unexpected growth dynamic within chondrichthyans that relates to the formation of a macromeric skeleton through integration of modular elements.
关键词	bone resorption Silurian dermal skeleton dentine jawed vertebrates fin spine
DOI	10.1098/rsbl.2025.0411
关键词[WOS]	PAIRED FINS ; EVOLUTION ; ORIGIN ; BONE ; FISH ; VERTEBRATES ; PLACODERM ; DENTITION ; HISTOLOGY ; CEMENT
收录类别	SCI
语种	英语
资助项目	Yunnan Province Young and Middle-Aged Academic and Technical Leaders Reserve Talents Program
项目资助者	Yunnan Province Young and Middle-Aged Academic and Technical Leaders Reserve Talents Program
WOS研究方向	Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Evolutionary Biology
WOS类目	Biology ; Ecology ; Evolutionary Biology
WOS记录号	WOS:001577394500001
出版者	ROYAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/24978
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Andreev, Plamen S.
作者单位	1.Qujing Normal Univ, Res Ctr Nat Hist & Culture, Qujing, Peoples R China 2.Nat Biodivers Ctr, Dept Understanding Evolut, Leiden, Netherlands 3.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham, England 4.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key CAS Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 5.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China 6.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 7.Paul Scherrer Inst, Swiss Light Source, Villigen, Switzerland 8.Leiden Univ, Inst Biol, Leiden, Netherlands
推荐引用方式 GB/T 7714	Andreev, Plamen S.,Zhu, Min,Brakenhoff, Lars,et al. The shoulder girdle of early chondrichthyans grew by skeletal remodelling[J]. BIOLOGY LETTERS,2025,21(9):8.
APA	Andreev, Plamen S..,Zhu, Min.,Brakenhoff, Lars.,Li, Qiang.,Zhao, Wenjin.,...&Rucklin, Martin.(2025).The shoulder girdle of early chondrichthyans grew by skeletal remodelling.BIOLOGY LETTERS,21(9),8.
MLA	Andreev, Plamen S.,et al."The shoulder girdle of early chondrichthyans grew by skeletal remodelling".BIOLOGY LETTERS 21.9(2025):8.