The lower jaw of Devonian ray-finned fishes (<i>Actinopterygii</i>): Anatomy, relationships, and functional morphology

doi:10.1002/ar.70005

IVPP-IR

	*The lower jaw of Devonian ray-finned fishes (Actinopterygii): Anatomy, relationships, and functional morphology*
	Igielman, Ben 1; Figueroa, Rodrigo Tinoco 2,3,4,5; Higgins, Robert R.4,5; Pierce, Stephanie E.4,5; Coates, Michael I.6; Troyer, Emily M.2,3; Fernandez, Vincent 7; Dollman, Kathleen 7; Lu, Jing 8,9; Zhu, Min8,9 ; Friedman, Matt 2,3,10; Giles, Sam 1,10
	2025-07-21
发表期刊	ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY
ISSN	1932-8486
页码	53
通讯作者	Giles, Sam(s.giles.1@bham.ac.uk)
摘要	Actinopterygii is a major extant vertebrate group, but limited data are available for its earliest members. Here we investigate the morphology of Devonian actinopterygians, focusing on the lower jaw. We use X-ray computed tomography (XCT) to provide comprehensive descriptions of the mandibles of 19 species, which span the whole of the Devonian and represent roughly two-thirds of all taxa known from more than isolated or fragmentary material. Our findings corroborate previous reports in part but reveal considerable new anatomical data and represent the first detailed description for roughly half of these taxa. The mandibles display substantial variation in size, spanning more than an order of magnitude. Although most conform to a generalized pattern of a large dentary and one or two smaller infradentaries, XCT data reveal significant differences in the structure of the jaw and arrangement of teeth that may be of functional relevance. We report the presence of a rudimentary coronoid process in several taxa, contributed to by the dentary and/or infradentaries, as well a raised articular region, resulting in a mandible with an offset bite and that functions as a bent level arm. Among the most striking variation is that of tooth morphology: several taxa have heterodont dentary teeth that vary in size and orientation, and multiple variations on enlarged, whorl-like and posteriorly-oriented anterior coronoid dentition are observed. We use these new data to revise morphological characters that may be of phylogenetic significance and consider the possible functional implicationds of these traits. The observed variation in mandible form and structure suggests previously unappreciated functional diversity among otherwise morphologically homogenous Devonian ray-finned fishes.
关键词	actinopterygian CT scanning fossil functional morphology lower jaw
DOI	10.1002/ar.70005
关键词[WOS]	WESTERN-AUSTRALIA ; GOGO FORMATION ; FEEDING MECHANISM ; EVOLUTION ; INTERRELATIONSHIPS ; OSTEICHTHYES ; LEPISOSTEUS ; ORIGIN ; GENUS ; SKULL
收录类别	SCI
语种	英语
资助项目	National Science Foundation ; Royal Society ; Natural Environment Research Council
项目资助者	National Science Foundation ; Royal Society ; Natural Environment Research Council
WOS研究方向	Anatomy & Morphology
WOS类目	Anatomy & Morphology
WOS记录号	WOS:001533127200001
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/311034/24500
专题	中国科学院古脊椎动物与古人类研究所
通讯作者	Giles, Sam
作者单位	1.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham, England 2.Univ Michigan, Museum Paleontol, Ann Arbor, MI 48104 USA 3.Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI USA 4.Harvard Univ, Museum Comparat Zool, Cambridge, MA USA 5.Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA USA 6.Univ Chicago, Organismal Biol & Anat, Chicago, IL USA 7.European Synchrotron Radiat Facil, Grenoble, France 8.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 9.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 10.Nat Hist Museum, London, England
推荐引用方式 GB/T 7714	Igielman, Ben,Figueroa, Rodrigo Tinoco,Higgins, Robert R.,et al. The lower jaw of Devonian ray-finned fishes (Actinopterygii): Anatomy, relationships, and functional morphology[J]. ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY,2025:53.
APA	Igielman, Ben.,Figueroa, Rodrigo Tinoco.,Higgins, Robert R..,Pierce, Stephanie E..,Coates, Michael I..,...&Giles, Sam.(2025).The lower jaw of Devonian ray-finned fishes (Actinopterygii): Anatomy, relationships, and functional morphology.ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY,53.
MLA	Igielman, Ben,et al."The lower jaw of Devonian ray-finned fishes (Actinopterygii): Anatomy, relationships, and functional morphology".ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY (2025):53.