Probability-based preservational variations within the early Cambrian Chengjiang biota (China).
Probability-based preservational variations within the early Cambrian Chengjiang biota (China).
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DOI：
10.7717/peerj.13869
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发表时间：
2022
期刊：
影响因子：
2.7
通讯作者：
Antcliffe, Jonathan B.
中科院分区：
文献类型：
--
作者：
Saleh, Farid;Ma, Xiaoya;Guenser, Pauline;Mangano, M. Gabriela;Buatois, Luis A.;Antcliffe, Jonathan B.
中国云南省澄江生物群是寒武纪大爆发早期软体动物化石的宝库。其独特的保存机制，被称为伯吉斯页岩类型的保存机制，已经得到了很好的理解。然而，人们对该生物群中不同动物类群之间的保存差异知之甚少。本研究采用概率方法比较了澄江生物群11个主要动物类群的组织发生数据。这项研究的化石数据与之前的衰变实验进行了比较。这表明，并非所有类群都能平等地保存软组织，一些高级类群比其他类群更容易保存软组织。这些化石保存的差异可以用生物特征和环境特征的相互作用来解释。分类识别上的差异也会产生偏差，因为有些标本即使保存较差也很容易被识别出来，而另一些标本即使保存很好也很难归属于更高的分类群。
The Chengjiang biota (Yunnan Province, China) is a treasure trove of soft-bodied animal fossils from the earliest stages of the Cambrian explosion. The mechanisms contributing to its unique preservation, known as the Burgess Shale-type preservation, are well understood. However, little is known about the preservation differences between various animal groups within this biota. This study compares tissue-occurrence data of 11 major animal groups in the Chengjiang biota using a probabilistic methodology. The fossil-based data from this study is compared to previous decay experiments. This shows that all groups are not equally preserved with some higher taxa more likely to preserve soft tissues than others. These differences in fossil preservation between taxa can be explained by the interaction of biological and environmental characteristics. A bias also results from differential taxonomic recognition, as some taxa are easily recognized from even poorly preserved fragments while other specimens are difficult to assign to higher taxa even with exquisite preservation.
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