| DOI: | 10.1016/j.palaeo.2015.11.033
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| 论文题名: | Ichnofossil record of selective predation by Cambrian trilobites |
| 作者: | Selly T.; Huntley J.W.; Shelton K.L.; Schiffbauer J.D.
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| 刊名: | Palaeogeography, Palaeoclimatology, Palaeoecology
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| ISSN: | 0031-0182
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| 出版年: | 2016
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| 卷: | 444 | | 起始页码: | 28
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| 结束页码: | 38
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| 语种: | 英语
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| 英文关键词: | Cambrian
; Davis Formation
; Predation
; Rusophycus
; Vermiform burrows
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| 英文摘要: | Evidence of predatory activity can be observed in the fossil record in the form of drill holes, repair scars, bite marks, and recognizable skeletal fragments in coprolites and preserved gut tracts. It is less common, however, to find fossil snapshots of predators caught in the act of feeding on their prey. Such interactions are preserved in recurring associations of the ichnogenera Rusophycus and Cruziana, most commonly attributed to trilobites, with burrows of likely vermiform (worm-like) organisms. In this study, we examine the Cambrian (Furongian Epoch, Steptoean Stage) Davis Formation, near Leadwood, southeastern Missouri, USA. In the lower to middle Davis Fm., several silty shale beds are extensively burrowed, from which we report a new occurrence and large number of Rusophycus traces associated with burrows of vermiform organisms. Within these beds, Rusophycus traces intersect vermiform burrows more often than expected by random chance and display a positive correlation in size between paired tracemakers. The median diameter of Rusophycus-associated vermiform burrows is significantly smaller than that of the non-intersected burrows. These results suggest that the paired traces record size selective predatory behavior. Moreover, low angle predator-prey trace intersections, though few in number, occurred more frequently than expected by random chance, supporting previous hypotheses that low angle attacks are preferred as they may improve prey handling success rates. © 2015 Elsevier B.V. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/68586
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Department of Geological Sciences, University of Missouri, Columbia, MO, United States
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| Recommended Citation: | |
Selly T.,Huntley J.W.,Shelton K.L.,et al. Ichnofossil record of selective predation by Cambrian trilobites[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,444
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