Internal Structure of Cambrian Fossil Embryo Markuelia Revealed in the Light of Synchrotron Radiation X-ray Tomographic Microscopy

doi:10.1111/j.1755-6724.2011.00381.x

	Internal Structure of Cambrian Fossil Embryo Markuelia Revealed in the Light of Synchrotron Radiation X-ray Tomographic Microscopy
	Cheng Gong 1,2; Peng Fan 1,2; Duan Baichuan 1,2; Dong Xiping 1,2
	2011
发表期刊	ACTA GEOLOGICA SINICA-ENGLISH EDITION
ISSN	1000-9515
卷号	85 期号:1 页码:81-90
摘要	In the light of Synchrotron Radiation X-ray Tomographic Microscopy (SRXTM), the internal structure of Markuelia hunanensis is revealed. In one example, vitrification and peeling show the annuli hidden under the chorion. Sectioning and 3-D reconstruction display an intact digestive tract from the inverted introvert to the terminal anus. The inverted introvert forms a rugby cavum. The following digestive tract is rope-like coiling, parallel to the body axis, about 650 mu m in length, and uniform in diameter (similar to 80 mu m). An exquisitely preserved pipe-like structure is hidden in the middle of the rope-like structure, diameter 20-40 mu m, with a length of similar to 120 mu m. We interpret this pipe-like structure as the possible epidermis of the gut and its surroundings as the possible residue of musculature, similar to that in Priapulans. The two symmetrical rod-shape structures connecting the body wall and digestive tract are interpreted as the possible retractor muscles. After comparing the well preserved Left-form and Right-form Body of Markuelia, we suggest that they may represent a dimorphism. Counted directly, one sample of Markuelia hunanensis possesses 62 annulations and the other 68.
关键词	Markuelia Synchrotron Radiation X-ray Tomographic Microscopy (SRXTM) dimorphism
DOI	10.1111/j.1755-6724.2011.00381.x
语种	英语
关键词[WOS]	SOUTH CHINA ; ANIMAL EMBRYOS ; WESTERN HUNAN ; PRESERVATION ; MIDDLE ; PHOSPHORITE ; LAGERSTATTE ; ORDOVICIAN ; AFFINITY ; ANATOMY
资助项目	National Natural Science Foundation of China[41072006] ; National Natural Science Foundation of China[40772008] ; Research Fund for Doctoral Program of High Education[20060001059] ; State Key Laboratory of Paleobiology, and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences[103102]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000286836700007
项目资助者	National Natural Science Foundation of China ; Research Fund for Doctoral Program of High Education ; State Key Laboratory of Paleobiology, and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences
出版者	WILEY-BLACKWELL PUBLISHING, INC
引用统计
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/484
专题	中国科学院南京地质古生物研究所
通讯作者	Dong Xiping
作者单位	1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratigraphy, Nanjing 210008, Peoples R China 2.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
第一作者单位	中国科学院南京地质古生物研究所
通讯作者单位	中国科学院南京地质古生物研究所
推荐引用方式 GB/T 7714	Cheng Gong,Peng Fan,Duan Baichuan,et al. Internal Structure of Cambrian Fossil Embryo Markuelia Revealed in the Light of Synchrotron Radiation X-ray Tomographic Microscopy[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2011,85(1):81-90.
APA	Cheng Gong,Peng Fan,Duan Baichuan,&Dong Xiping.(2011).Internal Structure of Cambrian Fossil Embryo Markuelia Revealed in the Light of Synchrotron Radiation X-ray Tomographic Microscopy.ACTA GEOLOGICA SINICA-ENGLISH EDITION,85(1),81-90.
MLA	Cheng Gong,et al."Internal Structure of Cambrian Fossil Embryo Markuelia Revealed in the Light of Synchrotron Radiation X-ray Tomographic Microscopy".ACTA GEOLOGICA SINICA-ENGLISH EDITION 85.1(2011):81-90.