Revision of the Cambrian discoidal animals Stellostomites eumorphus and Pararotadiscus guizhouensis from South China

	Revision of the Cambrian discoidal animals Stellostomites eumorphus and Pararotadiscus guizhouensis from South China
	Zhu, MY (朱茂炎); Zhao, YL ; Chen, JY (陈均远)
	2002-03-01
发表期刊	GEOBIOS
ISSN	0016-6995
卷号	35 期号:2 页码:165-185
摘要	The discoidal fossils identified as Stellostomites eumorphus Sun & Hou, Rotadiscus grandis Sun & Hou and Rotadiscus guizhouensis Zhao & Zhu are abundant in the Cambrian Chengjiang and Kaili Lagerstatten of southwest China. Reinvestigation of all available specimens of S. eumorphus and R. guizhouensis indicates that S. eumorphus has radiating lobe structures different from those of Eldonia ludwigi Walcott and has one additional set of dorsal radiating canals, and has a distinct central cavity, two characters that are not present in E. ludwigi. R. guizhouensis differs from R. grandis in the morphology of the disc, internal radiating lobes and tentacles. This supports the validity of the genus Stellostomites Sun & Hou, 1987, and substantiates the erection of a new genus, Pararotadiscus nov. gen., to receive Rotadiscus guizhouensis Zhao Zhu, 1994. Anatomical and taphonomical analyses indicate that S. eumorphus and P. guizhouensis were gregarious pelagic animals. The new anatomical information emphasize close phylogenetic relations with lophophorates (U-shaped intestine, circumoral tentacles and ectodermal, marginal accreted disc), though some features (e.g. dendritic tentacles, ventral pustules that may relate to reduced podia) do not exclude affinitics with echinoderms. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.
关键词	Discoidal Fossils Soft-bodied Fossils Cambrian Chengjiang Biota Kaili Biota Lophophorates Echinoderms
语种	英语
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:000177480600001
出版者	EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/1180
专题	中国科学院南京地质古生物研究所其他
通讯作者	Zhu, MY (朱茂炎)
作者单位	1.Acad Sinica, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China 2.Tech Univ Guizhou, Dept Res Engn, Guiyang 550003, Peoples R China
推荐引用方式 GB/T 7714	Zhu, MY ,Zhao, YL,Chen, JY . Revision of the Cambrian discoidal animals Stellostomites eumorphus and Pararotadiscus guizhouensis from South China[J]. GEOBIOS,2002,35(2):165-185.
APA	Zhu, MY ,Zhao, YL,&Chen, JY .(2002).Revision of the Cambrian discoidal animals Stellostomites eumorphus and Pararotadiscus guizhouensis from South China.GEOBIOS,35(2),165-185.
MLA	Zhu, MY ,et al."Revision of the Cambrian discoidal animals Stellostomites eumorphus and Pararotadiscus guizhouensis from South China".GEOBIOS 35.2(2002):165-185.