Ultrastructure of Ediacaran cloudinids suggests diverse taphonomic histories and affinities with non-biomineralized annelids
Ultrastructure of Ediacaran cloudinids suggests diverse taphonomic histories and affinities with non-biomineralized annelids
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埃迪卡拉云动物的超微结构表明其埋藏历史不同，并且与非生物矿化环节动物有亲缘关系
DOI：
10.1038/s41598-019-56317-x
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发表时间：
2020-01
影响因子：
4.6
通讯作者：
Pengju Liu
中科院分区：
文献类型：
--
作者：
Ben Yang;Michael Steiner;James D.Schiffbauer;Tara Selly;Xuwen Wu;Cong Zhang;Pengju Liu
云岩一直被认为是最早的生物矿化后生动物，但它们的亲缘关系仍然存在争议和未确定。基于保存完好的超微结构的两个类群，我们在这里提出了新的解释，其原始生物矿化的程度和它们的系统发育亲和力。其中一个分类群是来自蒙古的一个新的云虫，Zuunia chimidtserenigen。et sp. nov.，其表现出亚微米角质层、塑性管壁变形和管壁分层的关键特征。在纳米比亚和巴拉圭的Cloudina中也发现了多个碳质层片，我们解释其起源于几丁质或胶原纤维。我们推断，这些cloudinids最初主要是有机（几丁质或胶原），和死后腐烂和埋藏矿化导致文石和/或方解石的形成。此外，根据我们的超微结构特征和其他形态相似性，我们建议cloudinids应最吝啬地分配给环节动物与原来的有机管。
Cloudinids have long been considered the earliest biomineralizing metazoans, but their affinities have remained contentious and undetermined. Based on well-preserved ultrastructures of two taxa, we here propose new interpretations regarding both their extent of original biomineralization and their phylogenetic affinity. One of these taxa is a new cloudinid from Mongolia,Zuunia chimidtserenigen. et sp. nov., which exhibits key characteristics of submicrometric kerogenous lamellae, plastic tube-wall deformation, and tube-wall delamination. Multiple carbonaceous lamellae are also discovered inCloudinafrom Namibia and Paraguay, which we interpret to have originated from chitinous or collagenous fabrics. We deduce that these cloudinids were predominantly originally organic (chitinous or collagenous), and postmortem decay and taphonomic mineralization resulted in the formation of aragonite and/or calcite. Further, based on our ultrastructural characterization and other morphological similarities, we suggest that the cloudinids should most parsimoniously be assigned to annelids with originally organic tubes.
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影响因子：
5.8
作者：
--Manuscript Draft;Maoyan Zhu;A. Zhuravlev;R. Wood;Fangchen Zhao;Sergey Sokhov
通讯作者：
--Manuscript Draft;Maoyan Zhu;A. Zhuravlev;R. Wood;Fangchen Zhao;Sergey Sokhov
DOI：
10.4202/app.2010.0074
发表时间：
2012-03
期刊：
--
影响因子：
--
作者：
A. Zhuravlev;E. Liñán;J. A. G. Vintaned;F. Debrenne;A. B. Fedorov
通讯作者：
A. Zhuravlev;E. Liñán;J. A. G. Vintaned;F. Debrenne;A. B. Fedorov
影响因子：
2.6
作者：
Georgieva, Magdalena N.;Little, Crispin T. S.;Glover, Adrian G.
通讯作者：
Glover, Adrian G.
DOI：
10.1017/s0080456800016495
发表时间：
1931
期刊：
Transactions of the Royal Society of Edinburgh
影响因子：
--
作者：
E. Nicol
通讯作者：
E. Nicol
影响因子：
--
作者：
H. Wilshire
通讯作者：
H. Wilshire