The first record of Lauraceae fossil woods from the Cretaceous Puerto Yeru谩 Formation of eastern Argentina and palaeobiogeographic implications

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• 作者：Mar&iacute ; a Jimena Franco^a ; ^{jimenafr@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Mariana Brea^a ; ^{cidmbrea@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Esteban Passeggi^a ; ^{estebanpasseggi@cicyttp.org.ar" class="auth_mail" title="E-mail the corresponding author} ; Leandro Mart&iacute ; n Pé ; rez^b ; ^{pilosaperez@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Fossil wood ; Persea Mill. ; Lauraceae ; Cretaceous ; Palaeobiogeography ; Argentina ; Gondwana
• 刊名：Cretaceous Research
• 出版年：2015
• 出版时间：September-December 2015
• 年：2015
• 卷：56
• 期：Complete
• 页码：388-398
• 全文大小：5092 K

文摘

In this paper, a new species of fossil wood, Paraperseoxylon septatum sp. nov. (Lauraceae), from the Cretaceous of Puerto Yeruá Formation, is described. The fossil wood herein studied has features of the Lauraceae family, and particularly resembles the extant genus Persea Mill. The possible climatic conditions of the Puerto Yerúa Formation were inferred using the Vulnerability Index, Mesomorphy ratios and the Taxon Independent Approach of the anatomical features present in the fossil wood described, suggesting a warm and humid to seasonally dry context. This material is the first record known from the Cretaceous of Northeastern Argentina and the earliest occurrence in the Southern Hemisphere of a fossil taxon with feature closest to Persea, and clearly establishes the presence of Lauraceae in Northeastern Argentina during the Cretaceous. Nowadays the genus Persea has a tropical and subtropical disjunct distribution in the Americas, Asia, and the Canary Islands. The present study provides information pertinent to understanding its phylogenetic context and biogeographic history.