A fresh look at Cladarosymblema narrienense, a tetrapodomorph fish (Sarcopterygii: Megalichthyidae) from the Carboniferous of Australia, illuminated via X-ray tomography | |
Clement, Alice M.5; Cloutier, Richard4; Lu, Jing2,3; Perilli, Egon5; Maksimenko, Anton1; Long, John5 | |
刊名 | PEERJ |
2021-12-10 | |
卷号 | 9页码:30 |
关键词 | Sarcopterygii Tetrapodomorph Megalichthyidae Carboniferous Tomography Endocast Phylogenetic analysis 3D modelling Evolution Vertebrate |
ISSN号 | 2167-8359 |
DOI | 10.7717/peerj.12597 |
通讯作者 | Clement, Alice M.(alice.clement@flinders.edu.au) |
英文摘要 | 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. |
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] |
WOS关键词 | ANATOMY |
WOS研究方向 | Science & Technology - Other Topics |
语种 | 英语 |
出版者 | PEERJ INC |
WOS记录号 | WOS:000731293200001 |
资助机构 | 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 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.205/handle/311034/19132] |
专题 | 古脊椎动物与古人类研究所_图书馆1 |
通讯作者 | Clement, Alice M. |
作者单位 | 1.Australian Nucl Sci & Technol Org, Australian Synchrotron, Melbourne, Vic, Australia 2.CAS Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing, Peoples R China 4.Univ Quebec Rimouski, Dept Biol Chim & Geog, Rimouski, PQ, Canada 5.Flinders Univ S Australia, Coll Sci & Engn, Adelaide, SA, 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. |
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