Upper Campanian (Upper Cretaceous) cephalopods from the Parras Shale near Saucedas, Coahuila, Mexico
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- 作者：Christina Ifrima ; christina.ifrim@geow.uni-heidelberg.de" class="auth_mail" title="E-mail the corresponding author ; Wolfgang Stinnesbecka ; Belinda Espinosab ; José ; Flores Venturac
- 关键词：Ammonoids ; Biostratigraphy ; Campanian ; Cretaceous ; Nautiloids ; Paleobiogeography ; Parras Shale ; Mexico
- 刊名：Journal of South American Earth Sciences
- 出版年：2015
- 出版时间：December 2015
- 年：2015
- 卷：64
- 期：part_P1
- 页码：229-257
- 全文大小：16304 K
文摘
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Twelve genera and fourteen species of ammonites and one nautilid.
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They represent 3–4 upper Campanian biozones.
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There is a change from restricted towards geographically widespread faunas.
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This suggests gradual disappearence of faunal barriers.