Developmental biology of the early Cambrian cnidarian Olivooides

doi:10.1111/pala.12231

CORC > 北京大学 > 地球与空间科学学院

	Developmental biology of the early Cambrian cnidarian Olivooides
	Dong, Xi-Ping ; Vargas, Kelly ; Cunningham, John A. ; Zhang, Huaqiao ; Liu, Teng ; Chen, Fang ; Liu, Jianbo ; Bengtson, Stefan ; Donoghue, Philip C. J.
刊名	PALAEONTOLOGY
	2016
关键词	development embryo Cnidaria Scyphozoa Kuanchuanpu Cambrian RAY TOMOGRAPHIC MICROSCOPY SOUTH CHINA PHYLOGENETIC SIGNIFICANCE PALAEOSCOLECID WORMS CONULARIID TEST EMBRYOS SHAANXI FOSSILS ECDYSOZOANS EVOLUTION
DOI	10.1111/pala.12231
英文摘要	Fossilized embryos afford direct insight into the pattern of development in extinct organisms, providing unique tests of hypotheses of developmental evolution based in comparative embryology. However, these fossils can only be effective in this role if their embryology and phylogenetic affinities are well constrained. We elucidate and interpret the development of Olivooides from embryonic and adult stages and use these data to discriminate among competing interpretations of their anatomy and affinity. The embryology of Olivooides is principally characterized by the development of an ornamented periderm that initially forms externally and is subsequently formed internally, released at the aperture, facilitating the direct development of the embryo into an adult theca. Internal anatomy is known only from embryonic stages, revealing two internal tissue layers, the innermost of which is developed into three transversally arranged walls that partly divide the lumen into an abapertural region, interpreted as the gut of a polyp, and an adapertural region that includes structures that resemble the peridermal teeth of coronate scyphozoans. The anatomy and pattern of development exhibited by Olivooides appears common to the other known genus of olivooid, Quadrapyrgites, which differs in its tetraradial, as opposed to pentaradial symmetry. We reject previous interpretations of the olivooids as cycloneuralians, principally on the grounds that they lack a through gut and introvert, in embryo and adult. Instead we consider the affinities of the olivooids among medusozoan cnidarians; our phylogenetic analysis supports their classification as total-group Coronata, within crown-Scyphozoa. Olivooides and Quadrapyrgites evidence a broader range of life history strategies and bodyplan symmetry than is otherwise commonly represented in extant Scyphozoa specifically, and Cnidaria more generally.; National Natural Science Foundation of China [41372015]; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences [103102]; Research Fund for Doctoral Program of High Education [20060001059]; Science without Borders/CAPES; Danish Research Foundation [DNRF53]; Swedish Research Council [2010-3929, 2013-4290]; Natural Environment Research Council [NE/J018325/1, NE/F00348X/1]; Leverhulme Trust; Royal Society; Wolfson Foundation; Paul Scherrer Institute [20040261, 20050147, 20050597, 20060152, 20060846, 20070197, 20080872, 20100167, 20110963, 20130185, 20141047]; EU [312284]; SCI(E); ARTICLE; dongxp@pku.edu.cn; kelly.vargas@bristol.ac.uk; john.cunningham@bristol.ac.uk; hqzhang@nigpas.ac.cn; liuteng707@163.com; chenfang84@gmail.com; jbliu@pku.edu.cn; stefan.bengtson@nrm.se; phil.donoghue@bristol.ac.uk; 3; 387-407; 59
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/438258]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Dong, Xi-Ping,Vargas, Kelly,Cunningham, John A.,et al. Developmental biology of the early Cambrian cnidarian Olivooides[J]. PALAEONTOLOGY,2016.
APA	Dong, Xi-Ping.,Vargas, Kelly.,Cunningham, John A..,Zhang, Huaqiao.,Liu, Teng.,...&Donoghue, Philip C. J..(2016).Developmental biology of the early Cambrian cnidarian Olivooides.PALAEONTOLOGY.
MLA	Dong, Xi-Ping,et al."Developmental biology of the early Cambrian cnidarian Olivooides".PALAEONTOLOGY (2016).