• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chinese science bulletin >On the Phylum Vetulicolia
【24h】

On the Phylum Vetulicolia

机译：在玄参上

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 origins and radiations of metazoans, bilaterians, deuterostomes and vertebrates have been recognized as the four most important milestone events in animal history and, conversely four of the toughest and puzzling questions In evolutionary biology. Among them, the first two occurred in the deep of the Precambrian and have left little information in the fossil records. Fortunately, intensive investigation into the Early Cambrian Chengjiang faunas in the two decades have revealed numerous significant data on the episode of the Cambrian Explosion, particularly information on the various earliest-known deuterostomes, to a much better understanding of the last two events. The "first fish" Haikouichthys and Myllokunmingia have proved the oldest-known vertebrates, to be the most primitive ones, representing a key transitional group from acraniates to craniates. Indeed, "Pa-leontological work of Sim collaborators is revising our understanding of the early evolution of chordates". Moreover, the discovery of the Phylum Vetulicolia also throw new light on the origin of deuterostomes. This extinct group with simple gill slits might represent one of the roots in the deuterostome lineage, as the evidence of molecular biology developmental biology predicted. Here the first discovery of tiny vetulicolians from the Chengjiang Lagerstatte is reported. The evolutionary trend from the giant to the small represent a special adaptation in early animal history. Since all vetulicolians share similar characters in their anterior section (pharynx), and on the basis of differences in their posterior section, a new classification system is proposed, with a new class, the Heteromorphida erected. As both the "root" group vetulicolians and the "top" group vertebrates in the early deoterostome lineage, as well as those members in between, such as vetulocystids, yunnanozoans, cephalochordates and urochordates, have been recovered, a relatively complete early deuterostome phytogeny, which is compatible with phytogenies of deuterostomes, is nearly mature.
机译：后生动物，双语生物，氘化动物和脊椎动物的起源和辐射被认为是动物历史上四个最重要的里程碑事件，相反，它是进化生物学中最棘手和令人费解的四个问题。其中，前两个发生在前寒武纪的深层，在化石记录中几乎没有留下任何信息。幸运的是，对这两个十年的寒武纪澄江早期动物群进行了深入的调查，发现了有关寒武纪爆发事件的大量重要数据，尤其是有关各种最早已知的氘代口罩的信息，以便对后两个事件有更好的了解。 “第一条鱼” Haikouichthys和Myllokunmingia已被证明是最古老的脊椎动物，是最原始的脊椎动物，代表了从头足动物到颅骨的关键过渡群体。的确，“ Sim合作者的肺病学工作正在改变我们对和弦早期发展的理解”。不仅如此，Phylum Vetulicolia的发现也为氘化口琴的起源提供了新的思路。正如分子生物学发育生物学的证据所预言的那样，这个具有简单g裂的灭绝类可能代表了氘吻口谱系的根源之一。这里报道了从澄江拉格施塔特首次发现微小的葡萄菌的报道。从巨型到小型的进化趋势代表了早期动物历史的特殊适应。由于所有野牛科动物的前节（咽）都具有相似的特征，并且根据其后节的差异，提出了一种新的分类系统，即新的分类，即异形morph。随着早期deoterostome世系中的“根”类脊椎动物和“ top”类脊椎动物以及它们之间的成员，如vetulocystids，yunnanozoans，头针和弓形动物，都得到了恢复，相对完整的早期deuterostome的植物遗传学，与氘代口琴的植物遗传学相容的植物已经接近成熟。

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