Body mass of a large-sized Homotheriini (Felidae, Machairodontinae) from the Late Pliocene-Middle Pleistocene in Southern Uruguay: Paleoecological implications

IF 1.7 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Journal of South American Earth Sciences Pub Date : 2024-10-29 DOI:10.1016/j.jsames.2024.105231

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引用次数: 0

Abstract

Sabertooth cats (Felidae, Machairodontinae) are of particular interest for science, and general audience. Because this morphotype is not present in current faunas, several aspects of their biology are still little known in some taxa. The main goal of this contribution is to estimate the body mass (by using regression equations formulated for extant carnivorous mammals), and also the potential prey mass, of the material assigned to the saber-tooth cat cf. Xenosmilus sp. (MNHN Coll. F. OLIVERAS 31561) of the Late Pliocene-Middle Pleistocene from southern Uruguay. The body mass estimations calculated for this felid are within the range of 347–410 kg (average value 378 kg); while the estimated body size of its typical prey was around 1100 kg, the maximum estimated prey size varies from approximately 1800 to 2500 kg. According to these results, several aspects related to the paleoecology of this felid, referred to predator-prey interactions and its potential impact in the community of large carnivores from the beginning of the Quaternary in a regional context in southern South America, are discussed.

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乌拉圭南部晚更新世-中更新世一种大型同类（鼬科，Machairodontinae）的体重：古生态学意义

剑齿虎（猫科，Machairodontinae）是科学界和普通观众特别感兴趣的动物。由于剑齿虎的形态在目前的动物群中并不存在，因此在某些类群中，人们对其生物学的一些方面仍然知之甚少。本文的主要目的是估算乌拉圭南部晚更新世-中更新世剑齿虎（Xenosmilus sp.）（MNHN Coll. F. OLIVERAS 31561）的体重（使用为现存食肉哺乳动物制定的回归方程）以及潜在猎物的体重。计算得出的这种猫科动物的体重估计值在 347-410 千克范围内（平均值为 378 千克）；而其典型猎物的估计体重约为 1100 千克，最大猎物的估计体重约为 1800-2500 千克不等。根据这些结果，讨论了与这种猫科动物古生态学有关的几个方面，即捕食者与猎物之间的相互作用，以及它在南美洲南部地区第四纪初大型食肉动物群落中的潜在影响。

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

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.