Plated Cambrian bilaterians reveal the earliest stages of echinoderm evolution.

Plated Cambrian bilaterians reveal the earliest stages of echinoderm evolution.
复制标题

镀板的寒武纪双遗迹揭示了棘皮动物进化的最早阶段。

DOI:
10.1371/journal.pone.0038296
复制
发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Smith AB
Smith AB
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Zamora S;Rahman IA;Smith AB

文献摘要

参考文献

被引文献

相似文献

棘皮动物是唯一的五辐动物,与祖先的两侧对称身体结构相比,它比任何其他动物门都更加彻底。这种转变发生在个体发育过程中,因为棘皮动物的幼虫最初是双侧的,然后经过一个不对称的阶段,然后才产生五辐射的成年人。许多化石棘皮动物是放射状的,少数是不对称的,但直到现在还没有描述显示棘皮动物进化中原始的两侧对称阶段。在这里,我们报告了来自欧洲南部中寒武世早期的新化石,它们是第一个成年后具有完全两侧对称身体计划的棘皮动物。在形态上,它们介于两个最基本的纲之间,即栉囊藻总科(Ctenocystoidea)和栉囊藻纲(Ctenocystota)。这为所有棘皮动物提供了一个根源,并证实了最早的成员是存款饲养者,而不是悬浮饲养者。
Echinoderms are unique in being pentaradiate, having diverged from the ancestral bilaterian body plan more radically than any other animal phylum. This transformation arises during ontogeny, as echinoderm larvae are initially bilateral, then pass through an asymmetric phase, before giving rise to the pentaradiate adult. Many fossil echinoderms are radial and a few are asymmetric, but until now none have been described that show the original bilaterian stage in echinoderm evolution. Here we report new fossils from the early middle Cambrian of southern Europe that are the first echinoderms with a fully bilaterian body plan as adults. Morphologically they are intermediate between two of the most basal classes, the Ctenocystoidea and Cincta. This provides a root for all echinoderms and confirms that the earliest members were deposit feeders not suspension feeders.
DOI: 10.1666/06053.1
发表时间: 2007-12-01
期刊: PALEOBIOLOGY
影响因子: 2.7
作者:
Sumrall, Colin D.;Wray, Gregory A.
通讯作者: Wray, Gregory A.
DOI: 10.1093/sysbio/syr044
发表时间: 2011-07-01
期刊: SYSTEMATIC BIOLOGY
影响因子: 6.5
作者:
Janies, Daniel A.;Voight, Janet R.;Daly, Marymegan
通讯作者: Daly, Marymegan
DOI: 10.1016/j.ympev.2010.01.035
发表时间: 2010-07-01
影响因子: 4.1
作者:
Perseke, Marleen;Bernhard, Detlef;Schlegel, Martin
通讯作者: Schlegel, Martin
DOI: 10.1098/rspb.2011.1916
发表时间: 2012-04-22
影响因子: 4.7
作者:
Osborn, Karen J.;Kuhnz, Linda A.;Holland, Nicholas D.
通讯作者: Holland, Nicholas D.
DOI: 10.1111/j.1475-4983.2009.00880.x
发表时间: 2009-07-01
期刊: PALAEONTOLOGY
影响因子: 2.6
作者:
Smith, Andrew B.;Zamora, Samuel
通讯作者: Zamora, Samuel