玻利维亚丘基萨卡省更新世哺乳动物的新发现

IF 1.5 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
Alfredo E. Zurita , Carlos A. Luna , Francisco Cuadrelli , Daniel Barasoain , Ricardo H.A. Gómez , Omar Medina , Ángel R. Miño-Boilini
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引用次数: 0

摘要

自19世纪以来,生活在南美洲更新世(约2.6-0.0011 Ma)的哺乳动物古动物群在这个次大陆的几个地区,特别是在低地和高纬度地区,是众所周知的。然而,我们对这种古动物多样性的认识不平衡,特别是在玻利维亚目前领土的高地,主要来自塔里亚山谷。为了改善这一状况,本文介绍并描述了在东科迪勒拉和Subandean地质省的Chuquisaca省北部发现更新世哺乳动物的新化石地点(约2500-3500 m.a.s.l)。这些地点包括Sucre (S)、Yampárez (Ya)、Yotala (Yo)、Redención Pampa (Rp)、Potolo (P)、Quila Quila (Q)、Maragua (M)和Padilla (Pa),其中已鉴定出8个分类群:Xenarthra: Panochthus sp. (Rp, Ya)、Glyptodon jatunkhirkhi (Yo, Rp)、Pampatherium sp. (Rp)、toolypeutes cf. T. matacus (Rp)、Megatherium sp. (P);门:马属(Yo, Rp, Q, M);偶蹄目:喇嘛guanicoe;长喙目:舌齿Cuvieronius hyodon (Rp)。结果表明,到目前为止,G. jatunkhirkhi是东科迪勒拉和Subandean山脉的特有物种,而这是玻利维亚第一个更新世记录的toolypeutes (Chlamyphoridae),以前仅限于全新世早期,此外还有G. jatunkhirkhi的第一个下颌遗骸,这使得该物种的特征得到了更好的描述。总体而言,考虑到两种活的敏感物种(即toolypeutes t.c.m atacus和L. guanicoe)的存在,已知的组合表明存在开放和干旱/半干旱环境。大量的标本记录表明,丘基萨卡北部一些地区具有很高的化石潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
New localities with Pleistocene mammals from the Department of Chuquisaca (Bolivia)
Since the XIX century, the mammalian palaeofauna that inhabited the Pleistocene (ca. 2.6–0.0011 Ma) of South America is well known in several regions of this subcontinent, especially in the lowlands and at high latitudes. However, there is an imbalance in our knowledge of the diversity achieved by this palaeofauna, especially in the highlands of the current territory of Bolivia, known mainly from the Tarija Valley. With the aim of improving this situation, this paper presents and describes new fossil localities yielding Pleistocene mammals from the northern Department of Chuquisaca, in the Eastern Cordillera and Subandean geological provinces (ca. 25003500 m.a.s.l.). These localities include Sucre (S), Yampárez (Ya), Yotala (Yo), Redención Pampa (Rp), Potolo (P), Quila Quila (Q), Maragua (M), and Padilla (Pa), from which eight taxa have been identified: Xenarthra: Panochthus sp. (Rp, Ya), Glyptodon jatunkhirkhi (Yo, Rp), Pampatherium sp. (Rp), Tolypeutes cf. T. matacus (Rp), Megatherium sp. (P); Perissodactyla: Equus sp. (Yo, Rp, Q, M); Artiodactyla: Lama guanicoe (Rp); Proboscidea: Cuvieronius hyodon (Rp). The results show that so far G. jatunkhirkhi is endemic to the Eastern Cordillera and Subandean ranges, while it is reported the first Pleistocene record of Tolypeutes (Chlamyphoridae) for Bolivia, previously restricted to the Early Holocene, in addition to the first mandibular remains of G. jatunkhirkhi, which allows a better characterization of this species. Overall, the recognized assemblages suggest the presence of open and arid/semiarid environments, taking into account the presence of two living sensitive species, i.e. Tolypeutes T. cf. matacus and L. guanicoe. The large number of specimens recorded shows the high fossil potential of some localities in northern Chuquisaca.
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来源期刊
Journal of South American Earth Sciences
Journal of South American Earth Sciences 地学-地球科学综合
CiteScore
3.70
自引率
22.20%
发文量
364
审稿时长
6-12 weeks
期刊介绍: Papers must have a regional appeal and should present work of more than local significance. Research papers dealing with the regional geology of South American cratons and mobile belts, within the following research fields: -Economic geology, metallogenesis and hydrocarbon genesis and reservoirs. -Geophysics, geochemistry, volcanology, igneous and metamorphic petrology. -Tectonics, neo- and seismotectonics and geodynamic modeling. -Geomorphology, geological hazards, environmental geology, climate change in America and Antarctica, and soil research. -Stratigraphy, sedimentology, structure and basin evolution. -Paleontology, paleoecology, paleoclimatology and Quaternary geology. New developments in already established regional projects and new initiatives dealing with the geology of the continent will be summarized and presented on a regular basis. Short notes, discussions, book reviews and conference and workshop reports will also be included when relevant.
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