欢迎关注化石网微信公众号

化石网论坛

 找回密码
 注册

QQ登录

只需一步,快速开始

查看: 1807|回复: 8

【2016巨龙类】草原龙 Savannasaurus——澳洲晚白垩世新中型蜥脚类恐龙

[复制链接]
发表于 2016-10-21 00:55:32 | 显示全部楼层 |阅读模式
新蜥脚类恐龙描述
作者报导在澳大利亚昆士兰晚白垩世早期发现的两个新蜥脚类恐龙材料
其一属于新中型巨龙类蜥脚类恐龙——艾氏 草原龙 Savannasaurus elliottorum,是澳洲白垩纪最完整的蜥脚类恐龙
其二是迪亚曼蒂纳龙(Diamantinasaurus matildae)的新化石,包括第一次在澳大利亚发现的蜥脚类颅骨化石

研究显示, 草原龙和迪亚曼蒂纳龙是巨龙类分支在早白垩世广泛分布的孑遗种。这些物种通过从南美洲,跨越南极洲分散进入澳大利亚。

 楼主| 发表于 2016-10-21 00:56:52 | 显示全部楼层
澳大利亚一新蜥脚类揭示白垩纪恐龙的古生物地理学
   
Savannasaurus elliottorum
艾氏 草原龙
(新属,新种)
     
New Australian sauropods shed light on Cretaceous dinosaur palaeobiogeography
Stephen F. Poropat , Philip D.Mannion , Paul Upchurch , Scott A. Hocknull , Benjamin P. Kear , Martin Kundrát , Travis R. Tischler, Trish Sloan , George H. K. Sinapius , Judy A. Elliot  & David A. Elliott
   
Abstract
Australian dinosaurs have played arare but controversial role in the debate surrounding the effect of Gondwananbreak-up on Cretaceous dinosaur distribution. Major spatiotemporal gaps in theGondwanan Cretaceous fossil record, coupled with taxon incompleteness, havehindered research on this effect, especially in Australia. Here we report ontwo new sauropod specimens from the early Late Cretaceous of Queensland,Australia, that have important implications for Cretaceous dinosaurpalaeobiogeography. Savannasaurus elliottorum gen. et sp. nov. comprises one ofthe most complete Cretaceous sauropod skeletons ever found in Australia,whereas a new specimen of Diamantinasaurus matildae includes the first evercranial remains of an Australian sauropod. The results of a new phylogeneticanalysis, in which both Savannasaurus and Diamantinasaurus are recovered withinTitanosauria, were used as the basis for a quantitative palaeobiogeographicalanalysis of macronarian sauropods. Titanosaurs achieved a worldwidedistribution by at least 125 million years ago, suggesting that mid-CretaceousAustralian sauropods represent remnants of clades which were widespread duringthe Early Cretaceous. These lineages would have entered Australasia viadispersal from South America, presumably across Antarctica. High latitudesauropod dispersal might have been facilitated by Albian–Turonian warming thatlifted a palaeoclimatic dispersal barrier between Antarctica and South America.
回复 支持 反对

使用道具 举报

 楼主| 发表于 2016-10-21 00:57:52 | 显示全部楼层
sa1.jpg
sa2.jpg
sa3.jpg
回复 支持 反对

使用道具 举报

 楼主| 发表于 2016-10-21 00:58:51 | 显示全部楼层
迪亚曼蒂纳龙(Diamantinasaurus matildae)的新化石
sad1.jpg
sad2.jpg
sa8.jpg
sa11.jpg
回复 支持 反对

使用道具 举报

 楼主| 发表于 2016-10-21 00:59:28 | 显示全部楼层
sa4.jpg
sa5.jpg

回复 支持 反对

使用道具 举报

 楼主| 发表于 2016-10-21 01:01:31 | 显示全部楼层
回复 支持 反对

使用道具 举报

 楼主| 发表于 2016-10-21 01:02:44 | 显示全部楼层
新闻图
sa6.jpg
sa12.jpg
sa7.jpg
sa9.jpg
sa10.jpg
回复 支持 反对

使用道具 举报

您需要登录后才可以回帖 登录 | 注册

本版积分规则

化石网 2009年荣获联合国“世界信息峰会全球大奖” ( 苏ICP备05063896号 )

GMT+8, 2019-6-19 02:50

Powered by Discuz! X3.4

© 2001-2017 Comsenz Inc.

快速回复 返回顶部 返回列表