Southern beech (Nothofagaceae) fossil leaves from the Río Turbio Formation (Eocene–?Oligocene), Santa Cruz Province, Argentina.
Southern beech (Nothofagaceae) fossil leaves from the Río Turbio Formation (Eocene–?Oligocene), Santa Cruz Province, Argentina.
复制标题
南山毛榉（Nothofagaceae）化石叶子，产自阿根廷圣克鲁斯省里奥图尔比奥组（始新世–渐新世）。
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
C. Panti
中科院分区：
文献类型：
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作者：
C. Panti
本文描述了阿根廷圣克鲁斯省古近系里约热内卢Turbio组Nothofagaceae的6个化石种和2个分类单位的近百个化石叶片标本。该单位首次报道的有：单杀nothofus、变异nothofus、杉木nothofus、亚铁nothofus、dicksonnothofus、斜角nothofus、magelhaenica nothofus。它们在整个单元都有记录，但在里约热内卢Turbio组上段更为丰富，占总组合的68%。整个单元中Nothofagus丰度的增加趋势与晚始新世以来巴塔哥尼亚生态系统植物区系更替的开始一致，与古近纪末期全球明显的降温趋势一致。
Around one hundred specimens of fossil leaves are described herein and referred to 6 fossil-species and two taxonomic units of Nothofagaceae from the Paleogene Rio Turbio Formation, Santa Cruz Province, Argentina. These are: Nothofagus simplicidens , Nothofagus variabilis , Nothofagus lanceolata , Nothofagus subferruginea , Nothofagus dicksoni , Nothofagus sp. with Nothofagus cf. obliqua and Nothofagus magelhaenica reported for the first time for the unit. They were recorded throughout the unit, but they are fairly more abundant in the upper member of the Rio Turbio Formation where they reach the 68% of the overall assemblage. The observed increasing trend in Nothofagus abundance throughout the unit coincides with the beginning of the flora turnover that characterized Patagonian ecosystems from the Late Eocene onwards and it is in agreement with the marked global cooling trend of the terminal Paleogene.