阿根廷圣克鲁斯省Pinturas组早中新世光照厚生兽(哺乳目，有袋目，微生物科)的新认识

IF 1.2 4区地球科学 Q3 PALEONTOLOGY

Ameghiniana Pub Date : 2021-02-28 DOI:10.5710/AMGH.01.09.2020.3371

Germán Barmak, L. Chornogubsky, L. Gaetano

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引用次数: 0

摘要

这项工作描述了两种与Pachybiotherium illuminum相对应的新材料，Pachybiotherium illuminum是一种来自Pinturas组（中新世早期，阿根廷圣克鲁斯省）的微生物群系，以前在南苏密赫港的低层地层中报道过，现在在北苏密赫门的低层和可能的南洛斯托多斯地区的高层地层中记录过。这些新标本更好地了解了发光乳杆菌上臼齿的形态，如果水平分配正确，我们可以认为：1）发光乳杆菌首次被报道出现在典型的圣诞老人动物群中；2） Rio Pinturas地区的“Pinturan”和Santacracian动物群比之前报道的更相似；3）该物种的生物芯片得到扩展。

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New Insights on Pachybiotherium illuminatum(Mammalia, Marsupialia, Microbiotheriidae) from the Early Miocene of the Pinturas Formation (Santa Cruz Province, Argentina)

This work describes two new materials corresponding to Pachybiotherium illuminatum, a microbiotheriid from Pinturas Formation (early Miocene, Santa Cruz Province, Argentina) previously reported at the lower levels of the Formation on Portezuelo Sumich Sur, now recorded in lower levels of Portezuelo Sumich Norte and the possibly upper levels of Los Toldos Sur localities. The new specimens offer a better understanding of P. illuminatum upper molars morphology and, if the level assignation was correct, allow us to argue that 1) P. illuminatum is reported for the first time as appearing on a typical Santacrucian fauna; 2) the “Pinturan” and Santacrucian faunas at the Rio Pinturas localities are more similar than previously reported; 3) the biochron of the species is extended.

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来源期刊

Ameghiniana 地学-古生物学

CiteScore

2.50

自引率

10.00%

发文量

期刊介绍： Ameghiniana is a bimonthly journal that publishes original contributions on all disciplines related to paleontology, with a special focus on the paleontology of Gondwana and the biotic history of the southern hemisphere. Published yearly since 1957, it has undoubtedly become the main palaeontological publication from Latin America. Ameghiniana has recently broadened its editorial board, reorganized its production process, and increased to a bimonthly frequency, which resulted in a significant decrease in the turn around time.