www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

USEUROPEAFRICAASIA 中文雙語Fran?ais
China
Home / China / Society

Over 200 pterosaur eggs found in Xinjiang

chinadaily.com.cn | Updated: 2017-12-01 14:27
Over 200 pterosaur eggs found in Xinjiang

An artist's rendering depicts the Hamipterus tianshanensis, pterosaurs. [Photo/Zhao Chuang]

215 fossilized pterosaur eggs that lived more than 100 million years ago have been unearthed in Hami, Xinjiang Uygur autonomous region, with 16 of them first found with three-dimension preserved embryos inside, the paper.cn reported.

According to the new discovery published Friday on US journal Science, the fossilized pterosaur eggs were found in a three-meter-long sandstone block in the newly described "trove of pterosaur eggs" in Hami, by a team formed by Chinese and Brazil researchers during a long field survey lasting from 2006 to 2017. Before this, three pterosaur eggs that held well-developed embryos had been unearthed separately in China and Argentina.

"The place's been found rich in fossilized pterosaur and pterosaur eggs since the first 3D preserved pterosaur egg was discovered," said Wang Xiaolin, a paleontologist at the Institute of Vertebrate Paleontology and Paleoanthropology affiliated with the Chinese Academy of Sciences in Beijing, who leads the team.

In 2014, Wang and his team had uncovered the fossil remains of male and female pterosaurs known as Hamipterus tianshanensis in Hami, which now is the world's largest pterosaur egg collection ever found. According to Wang, at least one fossilized pterosaur could be found per square meter in the region.

To look into the embryos, the scientists used a computed tomography (CT) scanner, a machine that takes hundreds of X-rays and then arranges them in a virtual 3D image.

It showed that none of the 16 embryos had a full set of pterosaur bones, likely because pieces were lost over the years due to storms and floods.

But it also revealed that the little pterosaurs had well-developed thigh bones, suggesting that the reptiles could walk shortly after hatching and probably needed their parents to take care of them.

Previous 1 2 3 Next

Editor's picks
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 免费的成人a视频在线观看 免费的毛片 | 韩国一级特黄毛片大 | 亚洲国产成人久久精品图片 | 中文字幕二区三区 | 国产乱子伦露脸对白在线小说 | 国产女人伦码一区二区三区不卡 | 成年人在线免费观看网站 | 成年人午夜影院 | 欧美白人猛性xxxxx交69 | 日本红怡院在线 | 亚洲一区二区三区首页 | 91精品最新国内在线播放 | 欧美高清一区二区三区欧美 | 久久观看视频 | 欧美一级毛片无遮挡 | 亚洲经典三级 | 亚洲成人午夜影院 | 中国一级大黄大片 | 国内精品小视频福利网址 | a级国产乱理伦片在线观看 a级国产乱理伦片在线观看99 | 9久久99久久久精品齐齐综合色圆 | yy6080福利午夜免费观看 | 国产伦精一区二区三区 | 精品一区二区高清在线观看 | 毛片手机在线 | 男女视频在线观看免费 | 欧美日韩精品一区二区三区 | 99精品网 | 国内精品久久久久久久aa护士 | 18性欧美69| 亚洲成人免费在线观看 | 久久厕所 | 中文字幕有码在线 | 成人欧美在线 | 成人免费久久精品国产片久久影院 | 国产大片免费天天看 | 国产全部理论片线观看 | 99精品在线观看 | 精品a在线观看 | 99在线热播精品免费 | 日韩精品一区在线观看 |