| DOI: | 10.1016/j.palaeo.2017.04.003
|
| 论文题名: | Behavioural asymmetry in Devonian trilobites |
| 作者: | Zong R.-W.; Gong Y.
|
| 刊名: | Palaeogeography, Palaeoclimatology, Palaeoecology
|
| ISSN: | 0031-0182
|
| 出版年: | 2017
|
| 卷: | 476 | | 起始页码: | 158
|
| 结束页码: | 162
|
| 语种: | 英语
|
| 英文关键词: | Behavioural asymmetry
; Devonian
; Moulting
; Omegops
; Plagiolaria
|
| 英文摘要: | The cephalon of the trilobite Phacopidae was usually separated from the thorax during moulting, and abandoned near the trunk. We statistically evaluated the distribution pattern of the cephala of Omegops cornelius, and found that near 70% of the total cephala were displaced on the right side, from the Upper Devonian deposits of the western Junggar in Northwest China. Omegops cornelius might have actively pushed the cephalon to the right of its body during moulting, indicating their preference to move counterclockwise. This preferred movement direction manifested the behavioural asymmetry in trilobites. A different type of asymmetry has been observed in Phacopidae Plagiolaria nandanensis from the Lower Devonian of Guangxi in South China, where about 67% of the cephala were found on the left side of the trilobite trunks. So the behavioural asymmetry may be diverse (or opposite) in different species of trilobites, and the reasons for the asymmetric moulting and movement patterns of the above two trilobites are likely related to their body structures, or their living environments. These new materials provide evidence for studying the origin and evolution of behavioural asymmetry. © 2017 Elsevier B.V. |
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/67848
|
| Appears in Collections: | 过去全球变化的重建
|
|
There are no files associated with this item.
|
|
作者单位: | State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan, China
|
| Recommended Citation: | |
Zong R.-W.,Gong Y.. Behavioural asymmetry in Devonian trilobites[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,476
|
|
|