The systematics of the Mongolepidida (Chondrichthyes) and the Ordovician origins of the Glade

doi:10.7717/peerj.1850

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	The systematics of the Mongolepidida (Chondrichthyes) and the Ordovician origins of the Glade
	Andreev, Plamen 1; Coates, Michael I.2; Karatajute-Talimaa, Valentina 3; Shelton, Richard M.4; Cooper, Paul R.4; Wang, Nian-Zhong 5; Sansom, Ivan J.1
刊名	PEERJ
	2016-06-16
卷号	4
关键词	Solinalepis Gen. Nov. Scales Odontocomplex Morphogenesis Ordovician Mongolepids
DOI	10.7717/peerj.1850
文献子类	Article
英文摘要	The Mongolepidida is an Order of putative early chondrichthyan fish, originally erected to unite taxa from the Lower Silurian of Mongolia. The present study reassesses mongolepid systematics through the examination of the developmental, histological and morphological characteristics of scale-based specimens from the Upper Ordovician Harding Sandstone (Colorado, USA) and the Upper Llandovery-Lower Wenlock Yimugantawu (Tarim Basin, China), Xiushan (Guizhou Province, China) and Chargat (north-western Mongolia) Formations. The inclusion of the Mongolepidida within the Class Chondrichthyes is supported on the basis of a suite of scale attributes (areal odontode deposition, linear odontocomplex structure and lack of enamel, cancellous bone and hard-tissue resorption) shared with traditionally recognized chondrichthyans (euchondnchthyans e.g.,ctenacanthiforms) The mongolepid dermal skeleton exhibits a rare type of atubular dentine (lamellin) that is regarded as one of the diagnostic features of the Order within crown gnathostomes. The previously erected Mongolepididae and Shigiafiolepidae families are revised, differentiated by scale-base histology and expanded to include the genera Rongolepis. and Xinjiangichthys, respectively. A newly described mongolepid species (Solinalepis levis gen. et sp. nov.) from the Ordovician of North America is treated as family incertae sedis, as it possesses a type of basal bone tissue (acellular and vascular) that has yet to be documented in other mongolepids. This study extends the stratigraphic and palaeogeographic range of Mongolepidida and adds further evidence for an early diversification of the Chondrichthyes in the Ordovician Period, 50 million years prior to the first recorded appearance of euchondrichthyan teeth in the Lower Devonian.
WOS关键词	FUNCTIONAL-MORPHOLOGY ; LATIMERIA-CHALUMNAE ; ELECTRON-MICROSCOPY ; JAWED VERTEBRATES ; PLACODERM SCALES ; EARLY EVOLUTION ; CENTRAL-ASIA ; ODONTOBLAST ; SKELETON ; GNATHOSTOMES
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000378350500001
资助机构	University of Birmingham, School of Geography, Earth and Environmental Sciences Research Council(GR3/8543 ; Palaeontogical Association: Sylvester-Bradley Award ; NER/B/S/2000/0028)
内容类型	期刊论文
源URL	[http://124.16.247.212/handle/311034/7011]
专题	古脊椎动物与古人类研究所_图书馆1
作者单位	1.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham, W Midlands, England 2.Univ Chicago, Dept Organismal Biol & Anat, 1025 E 57Th St, Chicago, IL 60637 USA 3.Vilnius State Univ, Dept Geol & Mineral, Vilnius, Lithuania 4.Univ Birmingham, Sch Dent, Birmingham, W Midlands, England 5.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Andreev, Plamen,Coates, Michael I.,Karatajute-Talimaa, Valentina,et al. The systematics of the Mongolepidida (Chondrichthyes) and the Ordovician origins of the Glade[J]. PEERJ,2016,4.
APA	Andreev, Plamen.,Coates, Michael I..,Karatajute-Talimaa, Valentina.,Shelton, Richard M..,Cooper, Paul R..,...&Sansom, Ivan J..(2016).The systematics of the Mongolepidida (Chondrichthyes) and the Ordovician origins of the Glade.PEERJ,4.
MLA	Andreev, Plamen,et al."The systematics of the Mongolepidida (Chondrichthyes) and the Ordovician origins of the Glade".PEERJ 4(2016).