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    寒武纪三叶虫Oryctocephalus indicus(Reed, 1910)的蜕壳

    陈贵英 韩乃仁 赵元龙

    陈贵英, 韩乃仁, 赵元龙, 2008. 寒武纪三叶虫Oryctocephalus indicus(Reed, 1910)的蜕壳. 地球科学, 33(6): 783-792.
    引用本文: 陈贵英, 韩乃仁, 赵元龙, 2008. 寒武纪三叶虫Oryctocephalus indicus(Reed, 1910)的蜕壳. 地球科学, 33(6): 783-792.
    CHEN Gui-ying, HAN Nai-ren, ZHAO Yuan-long, 2008. Moulting of the Cambrian Trilobite Oryctocephalus Indicus(Reed, 1910). Earth Science, 33(6): 783-792.
    Citation: CHEN Gui-ying, HAN Nai-ren, ZHAO Yuan-long, 2008. Moulting of the Cambrian Trilobite Oryctocephalus Indicus(Reed, 1910). Earth Science, 33(6): 783-792.

    寒武纪三叶虫Oryctocephalus indicus(Reed, 1910)的蜕壳

    基金项目: 

    国家自然科学基金项目 40672018

    广西地质工程中心重点实验室开放基金 桂科能07109011-K006

    地质资源与地质工程广西高校人才小高地创新团队项目 桂教人[2005]80号

    详细信息
      作者简介:

      陈贵英(1965-), 女, 博士研究生, 主要从事三叶虫构造研究.E-mail:cgy@glite.edu.cn

    • 中图分类号: P534.41

    Moulting of the Cambrian Trilobite Oryctocephalus Indicus(Reed, 1910)

    • 摘要: 描述了产于黔东南剑河县中寒武统凯里组中上部的19块中寒武统底部标志化石--印度掘头虫Oryctocephalus indicus (Reed, 1910) 蜕壳标本, 其中大部分缺失头盖, 其余外壳保存完好.对其蜕壳过程进行了探讨, 认为蜕壳程序如下: 头甲以小于90°角下弯, 导致背壳沿头、胸接合处裂开; 面线张开, 自由颊与头盖裂开; 虫体恢复平伸状态, 头盖旋转; 三叶虫携老壳向前爬行, 并将已与自由颊和胸甲裂开的头盖顶翻于头甲前方; 虫体继续向前爬行, 并将头盖扒向两侧; 虫体向前爬行并不断颤动, 最终脱掉老壳.被脱掉的老壳胸尾相连, 腹边缘-唇瓣板与自由颊基本位于原位, 与“Phacopid式蜕壳”或“Salter式埋藏”明显不同.

       

    • 图  1  化石产地交通位置

      Fig.  1.  The location map

      图  2  Oryctocephalus indicus (Reed, 1910) 的蜕壳过程

      a.蜕壳Ⅰ期, 头盖与自由颊、胸甲裂开, 右转(NIGP123452, 图版Ⅱ, 5);b.蜕壳Ⅱ期, 头盖翻转于头甲前方(NIGP123451, 图版Ⅱ, 6);c.蜕壳Ⅲ期, 头盖旋转至虫体右侧(NIGP123454, 图版Ⅱ, 3);d.蜕壳Ⅳ期, 头盖缺失, 腹边缘-唇瓣板与自由颊相连基本位于原位, 胸尾相连, (NIGP123466, 图版Ⅰ, 1)

      Fig.  2.  Moulting configurations in Oryctocephalus indicus (Reed, 1910) ordered in a possible sequence

      图版Ⅰ  图版Ⅰ

      图版Ⅱ  图版Ⅱ

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    出版历程
    • 收稿日期:  2008-07-25
    • 刊出日期:  2008-11-25

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