The feeding behaviour of the Cambrian tubiculous priapulid Selkirkia

The feeding behaviour of the Cambrian tubiculous priapulid Selkirkia
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寒武纪管状早幼虫Selkirkia的摄食行为

DOI:
10.1111/let.12093
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发表时间:
2015
期刊:
影响因子:
1.5
通讯作者:
Zhang, X.-G.
Zhang, X.-G.
中科院分区:
地球科学4区
文献类型:
--
作者:
Lan, T.;Yang, J.;Hou, J.-B.;Zhang, X.-G.

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觅食行为模式有可能揭示进化趋势,特别是在寒武纪爆发的临界点。在此背景下,我们提供了从下寒武统(阶段3)小石坝拉格斯塔特采集的原地保存的管状无足类Selkirkia Sinica标本,显示了其深色肠道内肠道内容物的不同形态和粪便颗粒的形成。S.C.Sinica显示的两种消化模式表明,它是一种假定的饮食多面手,而不是之前认为的典型的清道夫。此外,中华绒毛虫成对的尾部附属物所表现出的不对称性为Selkirkia背腹(DV)分化的发育提供了直接证据,这有助于我们了解这种管状蠕虫的生活方式。
Feeding behavioural patterns have the potential to shed light on evolutionary trends, especially at the critical point of the Cambrian Explosion. In this context, we present specimens of the tubiform priapulid Selkirkia sinica, preserved in situ, collected from the lower Cambrian (Stage 3) Xiaoshiba Lagerstatte, which show the diverse morphology of its intestinal contents within the dark-coloured gut and the formation of faecal pellets. The two digestive modes displayed by S. sinica suggest that it is a putative dietary generalist rather than a typical scavenger as previously thought. Moreover, the asymmetry exhibited by the paired caudal appendages of S. sinica provides direct evidence of the development of dorsoventral (DV) differentiation in Selkirkia, which aids our understanding of the lifestyle of this tubiculous worm.
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