釘齒獸

维基百科,自由的百科全书
跳转至: 导航搜索
 
釘齒獸
化石時期: 早始新世
科學分類
界: 動物界 Animalia
綱: 哺乳動物綱 Mammalia
下綱: 真獸下綱 Eutheria
總目: 靈長總目 Euarchontoglires
(未分级) 齧齒動物 Glires
屬: 釘齒獸屬 Gomphos
Shevyreva, 1975
  • G. elkema

釘齒獸學名Gomphos)是一滅絕齧齒動物。牠們生存於5500萬年前始新世早期的中國蒙古。其模式種G. elkema。 生物学家在蒙古戈壁发现的一具距今5500万年前的兔子祖先的化石,该种动物以前曾有发现,但如此完整的化石尚是首次发现。


化石的研究者,德国柏林洪堡大学的罗伯特·阿斯教授等人在最新一期《科学》杂志中,对这具标本进行了描述。这种动物名为钉齿兽(Gomphos elkema),其属名“Gomphos”乃说明该动物牙齿的特征。钉齿兽的标本保存得相当完整,其骨骼与现生的兔子相似,其后腿长度是前腿的两倍以上。但它有一条长长的尾巴;而它的牙齿与其说像兔子,不如说更与松鼠相似。

远古的跳跃者 钉齿兽是现代兔子的古代亲戚

阿斯教授称:钉齿兽与现代的兔类有极为紧密地关系,它的发现有力支持了现代胎盘类动物出现于恐龙灭绝之后的理论。

參考[编辑]

  • The Beginning of the Age of Mammals by Kenneth D. Rose
  • The Rise of Placental Mammals: Origins and Relationships of the Major Extant Clades by Kenneth D. Rose and J. David Archibald

Biologists in Mongolia Gobi found a 55000000 years ago rabbit fossil ancestors, this kind of animal has previously been found, but such a complete fossil remains are found for the first time.Fossil research, Humboldt University Berlin professor Robert Aas in the latest issue of " science " magazine, the specimens were described. This animal is called spiked beast ( Gomphos elkema ), the genus name " Gomphos " is a description of the animal teeth characteristics. Toothed animal specimens of a perfectly preserved, its skeleton and the rabbit are similar, their hind leg length is more than two times. But it has a long tail; while its teeth much like rabbits and squirrels are similar, not to say.Ancient jump spike is the beast ancient relatives of modern rabbitProfessor Aas said: spiked beast and modern rabbits have extremely close relationship, it found strong support for modern placental animal appeared in the extinction of the dinosaurs after theory.

外部連結[编辑]