澳门正规网赌网站-澳门十大正规平台

     澳门正规网赌网站 >> 出版物 >> 古脊椎动物学报

学报文章下载

产自中国云南下禄丰组(下侏罗统)的爬行动物不完美硕鳄的再研究

2012年第50卷 第2期: 151-159

发表日期:2012-04-23来源:放大 缩小

编辑:Paul M. BARRETT, 徐 星

摘要:一般认为植龙类在三叠纪末期灭绝,但有研究显示它们可能在欧洲和亚洲延续到了侏罗纪最早期。来自亚洲的证据是产自中国云南下禄丰组(?赫唐阶-锡内穆阶)的不完美硕鳄(Pachysuchus imperfectus)。重新研究显示不完美硕鳄正型标本和植龙类存在许多不同点,它可能属于一个保存较差的、分类位置无法确定的蜥脚型类恐龙头骨。这一属种的归入标本也无法明确归入某一类群,因此亚洲没有可靠的晚于三叠纪的植龙类化石记录。欧洲的侏罗纪植龙类化石也存在着同样的问题。因而认为,植龙类的化石记录仅限于三叠纪晚期。

关键词:云南,下侏罗统,蜥脚型类,植龙类

卷期:50卷 02期

 

THE ENIGMATIC REPTILE PACHYSUCHUS IMPERFECTUS YOUNG, 1951 FROM THE LOWER LUFENG FORMATION (LOWER JURASSIC) OF YUNNAN, CHINA

 

Paul M. BARRETTXU Xing


Abstract
 Phytosaurs are generally considered to have become extinct at the end of the Triassic Period, but several records have suggested that they survived into the basal Jurassic in Europe and Asia. The Asian record consists of Pachysuchus imperfectus from the Lower Lufeng Formation (?Hettangian–Sinemurian) of Yunnan, China. However, this specimen differs from phytosaurs in numerous respects and is more likely a poorly preserved, indeterminate sauropodomorph dinosaur skull. The referred specimens of this species are also regarded as indeterminate, thereby removing the post-Triassic record of phytosaurs from Asia. The European records of Jurassic phytosaurs are also shown to be doubtful, suggesting that this clade was restricted to the Late Triassic.
Key words  Yunnan, Lower Jurassic, Sauropodomorpha, Phytosauria

附件:

澳门正规网赌网站|澳门十大正规平台

XML 地图 | Sitemap 地图