Ammonoid age control of the Early Triassic marine reptiles from Chaohu (South China)

详细信息    查看全文

• 作者：Cheng Ji^a ; ^{chengji@nigpas.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Chao Zhang^a ; Da-Yong Jiang^b ; ^c ; ^{djiang@pku.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Hugo Bucher^d ; ^{hugo.fr.bucher@pim.uzh.ch" class="auth_mail" title="E-mail the corresponding author} ; Ryosuke Motani^e ; ^{rmotani@ucdavis.edu" class="auth_mail" title="E-mail the corresponding author} ; Andrea Tintori^f ; ^{andrea.tintori@unimi.it" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Ammonoid ; Early Triassic ; Marine reptiles ; Chaohu
• 刊名：Palaeoworld
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：24
• 期：3
• 页码：277-282
• 全文大小：1946 K

文摘

Here we described a series of ammonoid specimens from the Early Triassic of Chaohu, South China and recognized the occurrence of Procolumbites for the first time in this area. The Procolumbites layer is about one meter above the first appearance of Chaohusaurus, indicating that the oldest Chaohusaurus is within the Procolumbites Zone of middle Spathian age. This new age constrain is significantly older than the previously suggested Subcolumbites Zone assignment (early late Spathian). To date, Chaohusaurus is the oldest known ichthyopterygian.