A fresh look at Cladarosymblema narrienense, a tetrapodomorph fish (Sarcopterygii: Megalichthyidae) from the Carboniferous of Australia, illuminated via X-ray tomography

doi:10.7717/peerj.12597

IVPP-IR > 中科院古脊椎所（2000年以后）

	A fresh look at Cladarosymblema narrienense, a tetrapodomorph fish (Sarcopterygii: Megalichthyidae) from the Carboniferous of Australia, illuminated via X-ray tomography
	Clement, Alice M.1; Cloutier, Richard 2; Lu, Jing 3,4; Perilli, Egon 1; Maksimenko, Anton 5; Long, John 1
	2021-12-10
发表期刊	PEERJ
ISSN	2167-8359
卷号	9 页码:30
通讯作者	Clement, Alice M.(alice.clement@flinders.edu.au)
摘要	Background. The megalichthyids are one of several clades of extinct tetrapodomorph fish that lived throughout the Devonian-Permian periods. They are advanced "osteolepidid-grade"fishes that lived in freshwater swamp and lake environments, with some taxa growing to very large sizes. They bear cosmine-covered bones and a large premaxillary tusk that lies lingually to a row of small teeth. Diagnosis of the family remains controversial with various authors revising it several times in recent works. There are fewer than 10 genera known globally, and only one member definitively identified from Gondwana. Cladarosymblema narrienense Fox et al. 1995 was described from the Lower Carboniferous Raymond Formation in Queensland, Australia, on the basis of several well-preserved specimens. Despite this detailed work, several aspects of its anatomy remain undescribed. Methods. Two especially well-preserved 3D fossils of Cladarosymblema narrienense, including the holotype specimen, are scanned using synchrotron or micro-computed tomography (mu CT), and 3D modelled using specialist segmentation and visualisation software. New anatomical detail, in particular internal anatomy, is revealed for the first time in this taxon. A novel phylogenetic matrix, adapted from other recent work on tetrapodomorphs, is used to clarify the interrelationships of the megalichthyids and confirm the phylogenetic position of C. narrienense. Results. Never before seen morphological details of the palate, hyoid arch, basibranchial skeleton, pectoral girdle and axial skeleton are revealed and described. Several additional features are confirmed or updated from the original description. Moreover, the first full, virtual cranial endocast of any tetrapodomorph fish is presented and described, giving insight into the early neural adaptations in this group. Phylogenetic analysis confirms the monophyly of the Megalichthyidae with seven genera included (Askerichthys,Cladarosymblema, Ectosteorhachis, Mahalalepis, Megalichthys, Palatinichthys, and Sengoerichthys). The position of the megalichthyids as sister group to canowindrids, crown ward of "osteolepidids"(e.g.,Osteolepis and Gogonasus), but below "tristichopterids"such as Eusthenopteron is confirmed, but our findings suggest further work is required to resolve megalichthyid interrelationships.
关键词	Sarcopterygii Tetrapodomorph Megalichthyidae Carboniferous Tomography Endocast Phylogenetic analysis 3D modelling Evolution Vertebrate
DOI	10.7717/peerj.12597
关键词[WOS]	ANATOMY
收录类别	SCI
语种	英语
资助项目	Australian Research Council[DP160102460] ; Australian Research Council[LE180100136] ; Australian Research Council[DP200103398] ; Flinders University Impact Seed Funding ; NSERC Discovery Grant ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB26000000] ; National Science Fund for Excellent Young Scholars[42022011] ; National Natural Science Foundation of China[41872023]
项目资助者	Australian Research Council ; Flinders University Impact Seed Funding ; NSERC Discovery Grant ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Science Fund for Excellent Young Scholars ; National Natural Science Foundation of China
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000731293200001
出版者	PEERJ INC
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/19133
专题	中科院古脊椎所（2000年以后）
通讯作者	Clement, Alice M.
作者单位	1.Flinders Univ S Australia, Coll Sci & Engn, Adelaide, SA, Australia 2.Univ Quebec Rimouski, Dept Biol Chim & Geog, Rimouski, PQ, Canada 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 4.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China 5.Australian Nucl Sci & Technol Org, Australian Synchrotron, Melbourne, Vic, Australia
推荐引用方式 GB/T 7714	Clement, Alice M.,Cloutier, Richard,Lu, Jing,et al. A fresh look at Cladarosymblema narrienense, a tetrapodomorph fish (Sarcopterygii: Megalichthyidae) from the Carboniferous of Australia, illuminated via X-ray tomography[J]. PEERJ,2021,9:30.
APA	Clement, Alice M.,Cloutier, Richard,Lu, Jing,Perilli, Egon,Maksimenko, Anton,&Long, John.(2021).A fresh look at Cladarosymblema narrienense, a tetrapodomorph fish (Sarcopterygii: Megalichthyidae) from the Carboniferous of Australia, illuminated via X-ray tomography.PEERJ,9,30.
MLA	Clement, Alice M.,et al."A fresh look at Cladarosymblema narrienense, a tetrapodomorph fish (Sarcopterygii: Megalichthyidae) from the Carboniferous of Australia, illuminated via X-ray tomography".PEERJ 9(2021):30.