研究人員發現猛龍新品種迅
文章來源:未知 文章作者:meng 發布時間:2010-03-22 01:51 字體: [ ]  進入論壇
(單詞翻譯:雙擊或拖選)

A new species of dinosaur1, a relative of the famous Velociraptor(迅猛龍) , has been discovered in Inner Mongolia by two PhD students. The exceptionally well preserved(保藏的,腌制的) dinosaur, named Linheraptor exquisitus, is the first near complete skeleton of its kind to be found in the Gobi desert since 1972, and will help scientists work out the appearance of other closely related dinosaur species.

Linheraptor is in the Dromaeosauridae family of the carnivorous(食肉的) theropod(獸腳亞目的) dinosaurs2 and lived during the Late Cretaceous(白堊紀) period. In addition to Linheraptor and Velociraptor, theropod dinosaurs include charismatic(神賜能力的,超凡魅力的) meat-eaters like Tyrannosaurus rex(雷克斯霸王龍) and modern birds.

The two PhD students, Michael Pittman from UCL (University College London) and Jonah Choiniere from George Washington University (GWU), found the dinosaur sticking out of a cliff face during a field project in Inner Mongolia, China. Their research is published online today in the journal Zootaxa.

"Jonah saw a claw protruding3(伸出,突出) from the cliff face. He carefully removed it and handed it to me. We went through its features silently but he wanted my identification first. I told him it was from a carnivorous dinosaur and when he agreed I'm surprised nobody in London heard us shouting," said Michael Pittman, a PhD student in the UCL Department of Earth Sciences who was the co-discoverer of the dinosaur.

"I've always wanted to discover a dinosaur since I was a kid, and I've never given up on the idea. It was amazing that my first discovery was from a Velociraptor relative. My thesis is on the evolution and biomechanics of dinosaur tails but the carnivorous dinosaurs are my favourite and my specialty," he added.

At approximately 2.5 metres long and 25 kilograms, the researchers believe Linheraptor would have been a fast, agile4(敏捷的,靈活的) predator5 that preyed7 on small horned dinosaurs(三角龍) related to Triceratops(三角龍) . Like other dromaeosaurids(奔龍) , it possessed8 a large "killing9 claw" on the foot, which may have been used to capture prey6. Within the Dromaeosauridae family, Linheraptor is most closely related to another recently discovered species Tsaagan mangas.

Linheraptor differs from all other dromaeosaurs(馳龍科) because of a triangular10 hole in front of the eye socket11(眼窩,眼眶) called the antorbital fenestra(眶前孔) , which is a space in the skull12 that sinuses(鼻竇) would have occupied. In Linheraptor this triangular hole is divided into two cavities – one of which is particularly big.

"This is a really beautiful fossil and it documents a transitional(過渡期的) stage in dromaeosaurid evolution," said Dr. Xu Xing, Professor of Palaeontology at the Institute of Vertebrate Paleontology & Paleoanthropology (IVPP).

Linheraptor was found in rocks of the Wulansuhai Formation, part of a group of red sandstone rocks found in Inner Mongolia, China during a field expedition by the researchers in 2008. It is the fifth dromaeosaurid discovered in these rocks, which are famous for their preservation13 of uncrushed, complete skeletons.

The research was done as part of the Inner Mongolia Research project, led by Dr. Xu, which aims to better understand the Late Cretaceous ecosystem14 of Inner Mongolia, China which is analogous15(類似的) but less well-studied than the well known Late Cretaceous ecosytem of Outer Mongolia. The research was funded by the Geological Society of London, the US National Science Foundation, the Chinese National Science Foundation, and George Washington University.



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1 dinosaur xuSxp     
n.恐龍
參考例句:
  • Are you trying to tell me that David was attacked by a dinosaur?你是想要告訴我大衛被一支恐龍所攻擊?
  • He stared at the faithful miniature of the dinosaur.他凝視著精確的恐龍縮小模型。
2 dinosaurs 87f9c39b9e3f358174d58a584c2727b4     
n.恐龍( dinosaur的名詞復數 );守舊落伍的人,過時落后的東西
參考例句:
  • The brontosaurus was one of the largest of all dinosaurs. 雷龍是所有恐龍中最大的一種。 來自《簡明英漢詞典》
  • Dinosaurs have been extinct for millions of years. 恐龍絕種已有幾百萬年了。 來自《簡明英漢詞典》
3 protruding e7480908ef1e5355b3418870e3d0812f     
v.(使某物)伸出,(使某物)突出( protrude的現在分詞 );凸
參考例句:
  • He hung his coat on a nail protruding from the wall. 他把上衣掛在凸出墻面的一根釘子上。
  • There is a protruding shelf over a fireplace. 壁爐上方有個突出的架子。 來自辭典例句
4 agile Ix2za     
adj.敏捷的,靈活的
參考例句:
  • She is such an agile dancer!她跳起舞來是那么靈巧!
  • An acrobat has to be agile.雜技演員必須身手敏捷。
5 predator 11vza     
n.捕食其它動物的動物;捕食者
參考例句:
  • The final part of this chapter was devoted to a brief summary of predator species.本章最后部分簡要總結了食肉動物。
  • Komodo dragon is the largest living lizard and a fearsome predator.科摩多龍是目前存在的最大蜥蜴,它是一種令人恐懼的捕食性動物。
6 prey g1czH     
n.被掠食者,犧牲者,掠食;v.捕食,掠奪,折磨
參考例句:
  • Stronger animals prey on weaker ones.弱肉強食。
  • The lion was hunting for its prey.獅子在尋找獵物。
7 preyed 30b08738b4df0c75cb8e123ab0b15c0f     
v.掠食( prey的過去式和過去分詞 );掠食;折磨;(人)靠欺詐為生
參考例句:
  • Remorse preyed upon his mind. 悔恨使他內心痛苦。 來自《現代英漢綜合大詞典》
  • He had been unwise and it preyed on his conscience. 他做得不太明智,這一直讓他良心不安。 來自辭典例句
8 possessed xuyyQ     
adj.瘋狂的;擁有的,占有的
參考例句:
  • He flew out of the room like a man possessed.他像著了魔似地猛然沖出房門。
  • He behaved like someone possessed.他行為舉止像是魔怔了。
9 killing kpBziQ     
n.巨額利潤;突然賺大錢,發大財
參考例句:
  • Investors are set to make a killing from the sell-off.投資者準備清倉以便大賺一筆。
  • Last week my brother made a killing on Wall Street.上個周我兄弟在華爾街賺了一大筆。
10 triangular 7m1wc     
adj.三角(形)的,三者間的
參考例句:
  • It's more or less triangular plot of land.這塊地略成三角形。
  • One particular triangular relationship became the model of Simone's first novel.一段特殊的三角關系成了西蒙娜第一本小說的原型。
11 socket jw9wm     
n.窩,穴,孔,插座,插口
參考例句:
  • He put the electric plug into the socket.他把電插頭插入插座。
  • The battery charger plugs into any mains socket.這個電池充電器可以插入任何類型的電源插座。
12 skull CETyO     
n.頭骨;顱骨
參考例句:
  • The skull bones fuse between the ages of fifteen and twenty-five.頭骨在15至25歲之間長合。
  • He fell out of the window and cracked his skull.他從窗子摔了出去,跌裂了顱骨。
13 preservation glnzYU     
n.保護,維護,保存,保留,保持
參考例句:
  • The police are responsible for the preservation of law and order.警察負責維持法律與秩序。
  • The picture is in an excellent state of preservation.這幅畫保存得極為完好。
14 ecosystem Wq4xz     
n.生態系統
參考例句:
  • This destroyed the ecosystem of the island.這樣破壞了島上的生態系統。
  • We all have an interest in maintaining the integrity of the ecosystem.維持生態系統的完整是我們共同的利益。
15 analogous aLdyQ     
adj.相似的;類似的
參考例句:
  • The two situations are roughly analogous.兩種情況大致相似。
  • The company is in a position closely analogous to that of its main rival.該公司與主要競爭對手的處境極為相似。
TAG標簽: species dinosaur desert
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