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Medulloprotaxodioxylon triassicum gen. et sp nov., a taxodiaceous conifer wood from the Norian (Triassic) of northern Bogda Mountains, northwestern China
Wan, ML (万明礼)1,2,3,4; Yang, W4,5; Tang, P (唐鹏)2,3; Liu, LJ (刘陆军)1,2,3; Wang, J (王军)1,2,3
2017-06
Source PublicationREVIEW OF PALAEOBOTANY AND PALYNOLOGY
ISSN0034-6667
Volume241Pages:70-84
Abstract

A permineralized coniferous wood, Medulloprotaxodioxylon triassicum Wan, Yang, Tang, Liu et Wang gen. et sp. nov., is described from the Norian (Late Triassic) Huangshanjie Formation in the Dalongkou Section, Jimsar County, Xinjiang Uygur Autonomous Region, northwestern China. The fossil wood is composed of the pith, primary and secondary xylem. The pith is solid, circular, heterocellular, with numerous isolated or clustered secretory cells, and parenchyma. Secretory cells commonly form a network in a radial view. The pith is surrounded by numerous primary xylem strands and about 22 distinctive leaf traces. The primary xylem is endarch. Tracheids of primary xylem have helical and scalariform thickenings. The secondary xylem is pycnoxylic, composed of tracheids, rays and axial parenchyma. The general aspect of the tracheids and rays, presence of taxodioid cross field pits, and abundant axial parenchyma, indicate M. triassicum can be related to the taxodiaceous Cupressaceae sensu lato. By comparison with fossil and extant species of the Cupressaceae, M. triassicum is most comparable to Sequoiadendron giganteum (Lindley) Buchholz. It is hypothesized that M. triassicum represents an ancestral form of the Sequoioideae Saxton based on the anatomical characteristics of the pith and secondary xylem. The occurrence of M. triassicum would indicate that the taxodiaceous conifers had already individualized within the Cupressaceae during the Late Triassic. (C) 2017 Elsevier B.V. All rights reserved.

KeywordFossil Wood Medulloprotaxodioxylon Triassicum Gen. Et Sp.nov. Taxonomy Triassic Xinjiang
DOI10.1016/j.revpalbo.2017.02.009
Indexed BySCI
Language英语
WOS Research AreaPlant Sciences ; Paleontology
WOS SubjectPlant Sciences ; Paleontology
WOS IDWOS:000401216400006
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/13628
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorWang, J (王军)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Dept Palaeobot & Palynol, Nanjing 210008, Jiangsu, Peoples R China;
2.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
4.Missouri Univ Sci & Technol, Geol & Geophys Program, Rolla, MO 65409 USA;
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Wan, ML ,Yang, W,Tang, P ,et al. Medulloprotaxodioxylon triassicum gen. et sp nov., a taxodiaceous conifer wood from the Norian (Triassic) of northern Bogda Mountains, northwestern China[J]. REVIEW OF PALAEOBOTANY AND PALYNOLOGY,2017,241:70-84.
APA Wan, ML ,Yang, W,Tang, P ,Liu, LJ ,&Wang, J .(2017).Medulloprotaxodioxylon triassicum gen. et sp nov., a taxodiaceous conifer wood from the Norian (Triassic) of northern Bogda Mountains, northwestern China.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,241,70-84.
MLA Wan, ML ,et al."Medulloprotaxodioxylon triassicum gen. et sp nov., a taxodiaceous conifer wood from the Norian (Triassic) of northern Bogda Mountains, northwestern China".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 241(2017):70-84.
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