The oldest known larva and its implications for the plesiomorphy of   metazoan development

doi:10.1007/s11434-015-0886-9

CORC > 北京大学 > 地球与空间科学学院

	The oldest known larva and its implications for the plesiomorphy of metazoan development
	Zhang, Huaqiao ; Dong, Xi-Ping
刊名	SCIENCE BULLETIN
	2015
关键词	Oldest known larva Indirect development Plesiomorphy of metazoan development Cambrian South China MAXIMAL INDIRECT DEVELOPMENT SET-ASIDE CELLS PALAEOSCOLECID WORMS SOUTHERN SHAANXI LIFE-CYCLE BODY PLANS EVOLUTION CHINA LIGHT MARKUELIA
DOI	10.1007/s11434-015-0886-9
英文摘要	There has been a century-long debate in evolutionary developmental biology about whether the ancestral metazoan was a larva or an adult. Two competing hypotheses have been proposed: the "terminal addition" theory, which assumes the primitiveness of larvae, and the "intercalation" theory, which assumes the primitiveness of adults. A consensus has not yet been reached, but the "terminal addition" theory appears to be more widely accepted. However, in contrast to the majority of larvae among living metazoans, all currently known fossil invertebrate embryos such as Markuelia and Olivooides are direct developers. Here, we describe Eolarva kuanchuanpuensis gen. et sp. nov., the oldest known larva, from the early Cambrian (similar to 535 Ma) of South China. Eolarva kuanchuanpuensis lacks a mouth or any other type of feeding apparatus, which is non-feeding or lecithotrophic. It possesses a distinct body plan and might represent a cnidarian-grade animal. This is the first fossil evidence indicating that indirect development is the plesiomorphy of metazoan development.; National Natural Science Foundation of China [41372015, 41102003, J1210006]; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences [103102, 20132107]; Research Fund for the Doctoral Program of High Education [20060001059]; SCI(E); 中国科学引文数据库(CSCD); ARTICLE; dongxp@pku.edu.cn; 22; 1947-1953; 60
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/439308]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhang, Huaqiao,Dong, Xi-Ping. The oldest known larva and its implications for the plesiomorphy of metazoan development[J]. SCIENCE BULLETIN,2015.
APA	Zhang, Huaqiao,&Dong, Xi-Ping.(2015).The oldest known larva and its implications for the plesiomorphy of metazoan development.SCIENCE BULLETIN.
MLA	Zhang, Huaqiao,et al."The oldest known larva and its implications for the plesiomorphy of metazoan development".SCIENCE BULLETIN (2015).