• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Molluscan Studies >The opercula of neritopsid gastropods and their phylogenetic importance
【24h】

The opercula of neritopsid gastropods and their phylogenetic importance

机译：拟南芥腹足纲的腹盖及其系统发育重要性

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The fossil record of neritopsid opercula and shells shows that the shell shape typical for Neritopsidae and Neritidae appeared in the Triassic. The ancestors of Neritimorpha were most probably forms similar to Naticopsis. The operculum of Recent Neritopsis is composed of two calcitic parts secreted from inside and an aragonitic callus deposited from outside. Similar neritopsid opercula were already present in the Late Triassic. The first opercula with asymmetrically situated muscle scars, possibly ancestral for neritids, also appeared at that time.
机译：neritopsid opercula和壳的化石记录表明，三叠纪出现了Neritopsidae和Neritidae的典型壳形。 Neritimorpha的祖先很可能是类似于Naticopsis的形式。最近的尼特罗非病菌的盖由内部分泌的两个钙化部分和从外部沉积的石蒜愈伤组织组成。在三叠纪晚期，已经存在类似的神经节。当时还出现了第一个带有不对称的肌肉疤痕的盖，可能是祖先的神经元。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号