Early Cambrian <i>Cambroclavus </i>is a scleritomous eumetazoan unrelated to bryozoan or dasyclad algae

doi:10.1130/G51663.1

	*Early Cambrian Cambroclavus* is a scleritomous eumetazoan unrelated to bryozoan or dasyclad algae**
	Xiang, Kai 2,3,4; Yin, Zongjun 1,4; Liu, Wei 2,3,4; Zhao, Fangchen 4; Zhu, Maoyan 1,4
刊名	GEOLOGY
	2024-02-01
卷号	52 期号:2 页码:130-134
ISSN号	0091-7613
DOI	10.1130/G51663.1
通讯作者	Yin, Zongjun(zjyin@nigpas.ac.cn)
英文摘要	The origin of Bryozoa has long been an intriguing mystery, largely due to the dearth of unambiguous bryozoan fossils within Cambrian strata. The earliest bryozoan thus far identified, Protomelission, an early Cambrian microfossil from Australia and China, was recently contested and proposed to be dasyclad algae. Our reanalysis of micro-computed tomography data from Protomelission specimens, however, unveils previously unrevealed structures, indicating Protomelission to be neither bryozoan nor alga, but a scleritome of Cambroclavus, an early Cambrian microfossil typically found as disarticulated sclerites. The long-sought scleritomes suggest that enigmatic cambroclaves likely represent an extinct group of epitheliozoan-grade eumetazoan, with spiny sclerites covering their epidermis for defense. The prevalence of bizarre animals like cambroclaves, lacking modern analogues, implies a greater disparity of animal body plans during the Cambrian explosion than previously recognized. Our findings underscore the absence of definitive early Cambrian bryozoan fossils, further highlighting the dilemma of the origin of Bryozoa.
资助项目	National Key Research and Development Program of China[2022YFF0800100] ; National Natural Science Foundation of China[41921002] ; National Natural Science Foundation of China[42330209] ; National Natural Science Foundation of China[42022010] ; Youth Innovation Promotion Association of the CAS[Y2021083]
WOS关键词	ORIGIN
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC AMER, INC
WOS记录号	WOS:001186956400006
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the CAS
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/43618]
专题	中国科学院南京地质古生物研究所
通讯作者	Yin, Zongjun
作者单位	1.Univ Chinese Acad Sci, Nanjing Coll, Nanjing 211135, Peoples R China 2.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China 3.Peking Univ, Key Lab Orogen Belts & Crustal Evolut, Minist Educ, Beijing 100871, Peoples R China 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Xiang, Kai,Yin, Zongjun,Liu, Wei,et al. Early Cambrian Cambroclavus is a scleritomous eumetazoan unrelated to bryozoan or dasyclad algae[J]. GEOLOGY,2024,52(2):130-134.
APA	Xiang, Kai,Yin, Zongjun,Liu, Wei,Zhao, Fangchen,&Zhu, Maoyan.(2024).Early Cambrian Cambroclavus is a scleritomous eumetazoan unrelated to bryozoan or dasyclad algae.GEOLOGY,52(2),130-134.
MLA	Xiang, Kai,et al."Early Cambrian Cambroclavus is a scleritomous eumetazoan unrelated to bryozoan or dasyclad algae".GEOLOGY 52.2(2024):130-134.