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首页> 外文期刊>Journal of Systematic Palaeontology >Morphological and ecological diversity of Amebelodontidae (Proboscidea, Mammalia) revealed by a Miocene fossil accumulation of an upper-tuskless proboscidean
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Morphological and ecological diversity of Amebelodontidae (Proboscidea, Mammalia) revealed by a Miocene fossil accumulation of an upper-tuskless proboscidean

机译：上肢无牙长喙中新世化石的堆积揭示了Amebelodontidae（Proboscidea，Mammalia）的形态和生态多样性

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摘要

Amebelodontidae is the most taxonomically and morphologically diverse group of proboscideans. However, relative to the morphological variation of the mandible and mandibular tusks, ecological and phylogenetic differentiations within Amebelodontidae have been largely debated. Here we evaluate a middle Miocene fossil accumulation of a new amebelodontid, Aphanobelodon zhaoi gen. et sp. nov. This species lacks upper tusks, which is unique in elephantiforms. The mandible and mandibular tusk morphologies of A. zhaoi are similar to those of the genus Platybelodon, which is the typical representative of one of the two main amebelodontid branches (the other branch is represented by Amebelodon). We suggest that Amebelodon potentially used its mandible and mandibular tusks to dig for food in relatively hard substrates; whereas Platybelodon is more specialized and possibly used its mandibular tusks for cutting soft vegetation. Aphanobelodon zhaoi morphology indicates that it is an offshoot of the platybelodont clade within Amebelodontidae, because it has primitive undifferentiated states of the mandible and mandibular tusks. Cladistic analysis indicates that Aphanobelodon, Platybelodon and Torynobelodon comprise a monophyletic group within Amebelodontidae. This study enhances our knowledge regarding proboscidean evolutionary history in terms of morphology, taxonomy and biology.
机译：Amebelodontidae是在分类学和形态学上最多样化的长喙科动物。然而，相对于下颌和下颌牙的形态变化，在Amebelodontidae内的生态学和系统发育差异已引起很大争议。在这里，我们评估了一种新的阿米贝齿动物（Aphanobelodon zhaoi gen）的中新世中期化石沉积。等。十一月该物种缺乏上象牙，这在象形动物中是独特的。 A. zhaoi的下颌和下颌象牙形态与Platybelodon属的相似，后者是两个主要Ambelodontidid分支之一的典型代表（另一个分支由Amebelodon代表）。我们建议Amebelodon可能使用其下颌和下颌man牙在相对坚硬的基质中挖掘食物。而侧柏更专业，可能使用其下颌牙切割柔软的植被。 Aphanobelodon zhaoi形态表明它是Amebelodontidae内的platybelodont进化枝的分支，因为它具有下颌和下颌di牙的原始未分化状态。爬坡分析表明，Aphanobelodondon，Platybelodon和Torynobelodon在Amebelodontidae内构成了一个单系群。这项研究从形态，分类学和生物学的角度增强了我们对前肢进化历史的认识。

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  • 来源
    《Journal of Systematic Palaeontology》 |2017年第8期|601-615|共15页
  • 作者

    Shi-Qi Wang; Tao Deng; Jie Ye; Wen He; Shan-Qin Chen;

  • 作者单位

    Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China,CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China;

    Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China,CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China;

    Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China;

    Hezheng Paleozoological Museum, Hezheng 731200, China;

    Hezheng Paleozoological Museum, Hezheng 731200, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Amebelodontidae; functional morphology; evolution; proboscidean;

    机译：甲虫科功能形态演化;长生动物;

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