Ancient carnivorous fish discovered
时间:2011-09-15 08:12:25
搜索关注在线英语听力室公众号:tingroom,领取免费英语资料大礼包。
(单词翻译)
BEIJING, Sept. 14 (Xinhuanet) -- Scientists had discovered the fossils of a new species of ancient carnivorous fish, National Geographic1 reported Monday.
The newly-found ancient fish, "Laccognathus embryi", is a 1.8-meter-long
predator3, which was "waiting to lunge out to grab whatever was in front of it," said study co-author
Ted2 Daeschler, a vertebrate
zoologist4 at the Academy of Natural Sciences in Philadelphia, the U.S..
It had a
jaw5 filled with sharp teeth that were 1.5 inches long, the Journal of Vertebrate Paleontology described.
The fish lived in the Devonian period, 415 to 360 million years ago, which "was a fish-eats-fish kind of world," Daeschler said. "There was a real arms race going. If you didn't have good armor on your body, you were very vulnerable."
"It's not just finding the animal - it's also placing the animal in its
evolutionary6 crucible," Daeschler added.
Its closest living relative is the lungfish which can survive in the drought, scientists said.
Scientists hope the finding can help in their study on the revolution of fishes as well as other species.
分享到:
Error Warning!
出错了
Error page: /mobile/?aid=156314&mid=3
Error infos: Got error 28 from storage engine
Error sql: select `l`.`tag`,`l`.`index`,`l`.`level_id`,`b`.`id`,`b`.`word`,`b`.`spell`,`b`.`explain`,`b`.`sentence`,`b`.`src` from `new_wordtaglist` `l` left join `new_word_base` `b` on `l`.`tag`=`b`.`word` where `l`.`arc_id`='156314' and `l`.`level_id`>='' group by `b`.`word` order by `l`.`index` asc