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首页> 外文期刊>Journal of Systematic Palaeontology >The evolution of Eocene planktonic foraminifera Dentoglobigerina
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The evolution of Eocene planktonic foraminifera Dentoglobigerina

机译：农虫浮游对胺蛋白牙羊虫的演变

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摘要

Dentoglobigerina is a diverse genus of planktonic foraminifera ranging from the Eocene to Recent. However, the ancestry of Dentoglobigerina has been controversial. A growing body of evidence indicates that the genus Dentoglobigerina was spinose in life and evolved from Eocene Subbotina, whilst others have suggested its origins stem from Acarinina. Here we explore whether Subbotina or Acarinina is the ancestor of Dentoglobigerina by examining 35 specimens, evaluating their morphology and their occurrences through the middle to late Eocene, from localities worldwide. We find that Dentoglobigerina evolved similar to 4 million years earlier than previously documented, with the species Dentoglobigerina pseudovenezuelana and 'Dentoglobigerina' eotripartita recorded in middle Eocene, Zone E9. Morphological convergences between Dentoglobigerina and Subbotina were found with D. galavisi and D. pseudovenezuelana, and between Dentoglobigerina and Acarinina with 'D.' eotripartita. Spine holes were observed in D. galavisi and D. pseudovenezuelana, though not uniformly found in all forms. Our findings suggest that there are two distinct lineages: (1) Dentoglobigerina, encompassing the species D. pseudovenezuelana and D. galavisi as a descendant of Subbotina; and (2) 'Dentoglobigerina' (including 'D.' eotripartita) as a descendant of Acarinina. Our results contribute to a better understanding of Dentoglobigerina biostratigraphy, phylogeny and evolution, and have implications for taxonomy.
机译：牙葡萄球菌是一种不同于虫族的浮游动物属植物属的各种各样的。然而，Dentoglobigerina的祖先已经存在争议。越来越多的证据表明，牙葡萄球菌属的生命中的杀菌剂是杀菌剂，并从虫族次股，而其他人提出其源自亚氨基氨基。在这里，我们探讨亚比西纳或亚氨基尼娜是牙葡萄球菌的祖先，通过检查35个标本，从全世界的地方评估它们的形态及其在后期eocene。我们发现Dentoglobigerina的发展与之前记录的400万年相似，目前Dentoglobigerina pseudovenezuelana和'Dentoglobigerina'Eotripartita记录在中间eocene，E9区。用D. Galavisi和D.Pseudovenezuelana发现Dentoglobigerina和序息酸盐之间的形态聚集，以及Denglobigerina和Acarinina与'D.' Eotripartita。在D. Galavisi和D.Pseudovenezuelana中观察到脊柱孔，但在所有形式中都没有统一地发现。我们的研究结果表明，有两种不同的谱系：（1）Dentoglobigerina，包括D.Pseudovenezuelana和D. Galavisi作为子偶联的后裔; （2）'Dentoglobigerina'（包括'd.'eotripartita）作为Acarinina的后代。我们的结果有助于更好地理解牙葡萄球菌生物数据，系统发育和演化，对分类系统产生影响。

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