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巴塔哥尼亚发现新品种翼龙

来源: 英语作文网 时间: 2016-09-03 阅读:
Scientists today announced the discovery of a new species of pterosaur from the Patagonia region of South America. The cranial remains1 were in an excellent state of preservation2 and belonged to a new species of pterosaur from the Early Jurassic. The researchers have named this new species 'Allkauren koi' from the native Tehuelche word 'all' for 'brain', and 'karuen' for 'ancient'. Pterosaurs are an extinct group of flying reptiles3 that lived during most of the Mesozoic Era. This group had an extraordinary adaptation to flight, including pneumatic bones to lighten its weight, and an elongated4 digit5 supporting a wing membrane6. However, pterosaur neuroanatomy is known from only a few three dimensionally preserved remains and, until now, there was no information on the intermediate forms. This study therefore provides new information on the origin, tempo8 and mode of evolution in this particular group of flying reptiles.
 
The fossil of Allkaruen koi was found in northern central Chubut Province, Patagonia Argentina and the remains included a superbly preserved and uncrushed braincase. In order to study the neurocranial anatomy7, researchers used computed9 tomography to observe, in three dimensions, the cranial endocast and the inner ear. Subsequently, a comprehensive phylogenetic analysis of the group was performed, including these cranial data and other anatomical features. "Allkaruen, from the middle lower jurassic limit, shows an intermediate state in the brain evolution of pterosaurs and their adaptations to the aerial environment", said Dr Diego Pol, who is part of the research team. "As a result, this research makes an important contribution to the understanding of the evolution of all of pterosaurs."



  
1 remains     
n.剩余物,残留物;遗体,遗迹
参考例句:
  • He ate the remains of food hungrily.他狼吞虎咽地吃剩余的食物。
  • The remains of the meal were fed to the dog.残羹剩饭喂狗了。


  • 2 preservation     
    n.保护,维护,保存,保留,保持
    参考例句:
  • The police are responsible for the preservation of law and order.警察负责维持法律与秩序。
  • The picture is in an excellent state of preservation.这幅画保存得极为完好。


  • 3 reptiles     
    n.爬行动物,爬虫( reptile的名词复数 )
    参考例句:
  • Snakes and crocodiles are both reptiles. 蛇和鳄鱼都是爬行动物。 来自《简明英汉词典》
  • Birds, reptiles and insects come from eggs. 鸟类、爬虫及昆虫是卵生的。 来自《现代汉英综合大词典》


  • 4 elongated     
    v.延长,加长( elongate的过去式和过去分词 )
    参考例句:
  • Modigliani's women have strangely elongated faces. 莫迪里阿尼画中的妇女都长着奇长无比的脸。
  • A piece of rubber can be elongated by streching. 一块橡皮可以拉长。 来自《用法词典》


  • 5 digit     
    n.零到九的阿拉伯数字,手指,脚趾
    参考例句:
  • Her telephone number differs from mine by one digit.她的电话号码和我的只差一个数字。
  • Many animals have five digits.许多动物有5趾。


  • 6 membrane     
    n.薄膜,膜皮,羊皮纸
    参考例句:
  • A vibrating membrane in the ear helps to convey sounds to the brain.耳膜的振动帮助声音传送到大脑。
  • A plastic membrane serves as selective diffusion barrier.一层塑料薄膜起着选择性渗透屏障的作用。


  • 7 anatomy     
    n.解剖学,解剖;功能,结构,组织
    参考例句:
  • He found out a great deal about the anatomy of animals.在动物解剖学方面,他有过许多发现。
  • The hurricane's anatomy was powerful and complex.对飓风的剖析是一项庞大而复杂的工作。


  • 8 tempo     
    n.(音乐的)速度;节奏,行进速度
    参考例句:
  • The boss is unsatisfied with the tardy tempo.老板不满于这种缓慢的进度。
  • They waltz to the tempo of the music.他们跟着音乐的节奏跳华尔兹舞。


  • 9 computed     
    adj.[医]计算的,使用计算机的v.计算,估算( compute的过去式和过去分词 )
    参考例句:
  • He computed that the project would take seven years to complete. 他估计这项计划要花七年才能完成。 来自《简明英汉词典》
  • Resolving kernels and standard errors can also be computed for each block. 还可以计算每个块体的分辨核和标准误差。 来自辞典例句



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