一种底栖软体动物早期寒武纪阶段啃咬硬物失败及外壳修复的记录
Early Cambrian record of failed durophagy and shell repair in an epibenthic mollusc.
作者信息
Skovsted Christian B, Brock Glenn A, Lindström Anna, Peel John S, Paterson John R, Fuller Margaret K
机构信息
Centre for Ecostratigraphy and Palaeobiology, Department of Earth and Planetary Sciences, Macquarie University, New South Wales 2109, Australia.
出版信息
Biol Lett. 2007 Jun 22;3(3):314-7. doi: 10.1098/rsbl.2007.0006.
Predation is arguably one of the main driving forces of early metazoan evolution, yet the fossil record of predation during the Ediacaran-Early Cambrian transition is relatively poor. Here, we present direct evidence of failed durophagous (shell-breaking) predation and subsequent shell repair in the Early Cambrian (Botoman) epibenthic mollusc Marocella from the Mernmerna Formation and Oraparinna Shale in the Flinders Ranges, South Australia. This record pushes back the first appearance of durophagy on molluscs by approximately 40Myr.
捕食可以说是早期后生动物进化的主要驱动力之一，然而埃迪卡拉纪 - 寒武纪早期过渡期间捕食的化石记录相对较少。在这里，我们展示了来自南澳大利亚弗林德斯山脉的默尔纳纳组和奥拉帕林纳页岩的早寒武世（博托曼期）底栖软体动物马罗塞拉遭受压碎性（破壳）捕食失败及随后壳体修复的直接证据。这一记录将软体动物上压碎性捕食的首次出现时间推前了约4000万年。
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