首页> 外文期刊>Nature >A dromaeosaurid dinosaur with a filamentous integument from the Yixian Formation of China
【24h】

A dromaeosaurid dinosaur with a filamentous integument from the Yixian Formation of China

机译:来自中国宜县组的具丝状外膜的德龙恐龙

获取原文
获取原文并翻译 | 示例
           

摘要

Dromaeosaurids, despite their notoriety, are poorly characterized meat-eating dinosaurs, and were previously known only from disarticulated or fragmentary specimens. Many studies have denied their close relationship to birds. Here we report the best represented and probably the earliest dromaeosaurid yet discovered, Sinornithosaurus millenii gen. et sp. nov., from Sihe-tun, the famous Mesozoic fish-dinosaur-bird locality in China. Sinornithosaurus not only greatly increases our knowledge of Dromaeosauridae but also provides evidence for a filamentous integument in this group. It is remarkably similar to early birds postcranially. The shoulder girdle shows that terrestrial dromaeosaurids had attained the prerequisites for powered, flapping flight, supporting the idea that bird flight originated from the ground up. The discovery of Sinornithosaurus widens the distribution of integumentary filaments among non-avian thero-pods. Phylogenetic analysis indicates that, among known theropods with integumentary filaments or feathers, Dromaeosauridae is the most bird-like, and is more closely related to birds than is Troodontidae.
机译:棘龙科尽管臭名昭著,但它们的特征是食肉恐龙的特征很差,并且以前仅从断齿或破碎的标本中才知道。许多研究否认它们与鸟类的密切关系。在这里,我们报告最有代表性的,可能是迄今发现的最早的Dromaeosaurid millenii genenii gen。等。 11月,来自中国著名的中生代鱼-恐龙-鸟四合屯。中华龙不仅大大增加了我们对龙形龙科的认识,而且为这一群体的丝状外被提供了证据。它与颅后的早起的鸟非常相似。肩带表明陆生龙目蜥类动物已经达到了动力扑翼飞行的先决条件,从而支持了鸟类从头开始飞行的想法。中华龙的发现拓宽了非禽类兽足间皮状花丝的分布。系统发育分析表明,在已知的具有外皮细丝或羽毛的兽脚类动物中,Dromaeosauridae是最像鸟的,并且比Troodontidae与鸟类的亲密性更高。

著录项

  • 来源
    《Nature》 |1999年第6750期|p.262-266|共5页
  • 作者

    X Xu; X L Wang; X C Wu;

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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