The equids from Liventsovka and other localities of the Khaprovskii Faunal Complex, Russia: A revision

IF 1.6 4区地球科学 Q2 PALEONTOLOGY

Geobios Pub Date : 2022-02-01 DOI:10.1016/j.geobios.2021.11.001

Vera Eisenmann

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引用次数: 4

Abstract

The age and homogeneity of the Khaprovskii Faunal Complex have been a matter of debate for a long time. This works provides the most complete information (photographs and numerical data) ever published on the equid remains of this Complex. Evidence is given for the presence of no less than three, possibly six taxa of Equids. Most fossils are referred to Equus (Allohippus) aff. major and to Equus (Allohippus) livenzovensis, both redefined on the basis of correlations between cranial and metapodial dimensions. Comparisons with Chinese fossils bring evidence for their age approximating 2.5 Ma. A third very large species is represented by a few teeth and metapodials which may have been intrusive. It is referred to E. (Sussemionus) aff. verae because of similarities with the NE Siberian species believed to be about 1 myr old. Accumulation of fossils during a long period is probably responsible for the large intraspecific variation observed in E. (A.) major and E. (A.) livenzovensis and for the occurrence of several other equid forms. Possible intrusions may also explain the abnormal number of observed taxa. Resemblances with Chinese and NE Siberian fossils indicate Asian influences on the composition of the Khaprovskii Faunal Complex.

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俄罗斯哈普罗夫斯基动物群Liventsovka及其他地区的马科动物:订正

哈普罗夫斯基动物群的年龄和同质性长期以来一直是一个争论的问题。这部作品提供了迄今为止关于这个建筑群的遗迹的最完整的信息(照片和数字数据)。有证据表明，这里存在着不少于三种，甚至可能是六种马科动物。大多数化石被称为Equus (Allohippus) aff. major和Equus (Allohippus) livenzovensis，两者都是根据颅骨和后足部尺寸之间的相关性重新定义的。与中国化石的比较表明它们的年龄约为2.5 Ma。第三种非常大的物种以一些牙齿和可能侵入的后足趾为代表。它被称为E. (Sussemionus) af . verae，因为与东北西伯利亚的物种相似，据信大约有1万年的历史。在很长一段时间内化石的积累可能是在e.a major和e.a livenzovensis中观察到的巨大种内变异以及其他几种马科动物形式出现的原因。可能的入侵也可以解释观察到的分类群数量异常。与中国和东北西伯利亚化石的相似性表明亚洲对哈普罗夫斯基动物群的组成有影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geobios 地学-古生物学

CiteScore

3.30

自引率

6.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Geobios publishes bimonthly in English original peer-reviewed articles of international interest in any area of paleontology, paleobiology, paleoecology, paleobiogeography, (bio)stratigraphy and biogeochemistry. All taxonomic groups are treated, including microfossils, invertebrates, plants, vertebrates and ichnofossils. Geobios welcomes descriptive papers based on original material (e.g. large Systematic Paleontology works), as well as more analytically and/or methodologically oriented papers, provided they offer strong and significant biochronological/biostratigraphical, paleobiogeographical, paleobiological and/or phylogenetic new insights and perspectices. A high priority level is given to synchronic and/or diachronic studies based on multi- or inter-disciplinary approaches mixing various fields of Earth and Life Sciences. Works based on extant data are also considered, provided they offer significant insights into geological-time studies.