nature

当前位置: Nature » 进化生态 » 正文

Nature封面故事:一种草食性兽脚类恐龙

摘要 : 本期封面所示为正在一处已经灭绝的巴塔哥尼亚森林中吃植物叶子的恐龙,名叫Chilesaurus diegosuarezi

 

cover_nature (6)

本期封面所示为正在一处已经灭绝的巴塔哥尼亚森林中吃植物叶子的恐龙,名叫Chilesaurus diegosuarezi,实际上是由Gabriel Lio制作出的一个想象图。这一新发现的来自智利南部Aysén化石产地的恐龙已被确定为来自晚侏罗纪(距今大约1.5亿年前)的一种原始兽脚类恐龙。兽脚类恐龙(包括霸王龙和迅猛龙在内的一类恐龙)一般都是双足行走的,而且除了后来一些高度衍生的形式外几乎总是肉食性的。这个新种是兽脚类恐龙演化过程中一个相对较早的分支,但却是草食性的,将之前对恐龙来说没有记录到的一些特点和怪诞的解剖特征前所未有地组合到了一起。这一发现说明,即便是对恐龙演化的大致脉络,我们的了解也是何其之少。封面: Gabriel Lio

原文链接:

An enigmatic plant-eating theropod from the Late Jurassic period of Chile

原文摘要:

Theropod dinosaurs were the dominant predators in most Mesozoic era terrestrial ecosystems1. Early theropod evolution is currently interpreted as the diversification of various carnivorous and cursorial taxa, wheras the acquisition of herbivorism, together with the secondary loss of cursorial adaptations, occurred much later among advanced coelurosaurian theropods. A new, bizarre herbivorous basal tetanuran from the Upper Jurassic of Chile challenges this conception. The new dinosaur was discovered at Aysén, a fossil locality in the Upper Jurassic Toqui Formation of southern Chile (General Carrera Lake). The site yielded abundant and exquisitely preserved three-dimensional skeletons of small archosaurs. Several articulated individuals of Chilesaurus at different ontogenetic stages have been collected, as well as less abundant basal crocodyliforms, and fragmentary remains of sauropod dinosaurs (diplodocids and titanosaurians).

来源: Nature 浏览次数:3

热门文章TOP

RSS订阅 - 填写您的邮件地址,订阅我们的精彩内容: - 网站地图
网站联系电话:020-87540820 备案号:粤ICP备11050685号-8 增值电信业务经营许可证:粤B2-20120479
©2011-2015 生物帮 All rights reserved.