...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Early Miocene hippopotamids (Cetartiodactyla) constrain the phylogenetic and spatiotemporal settings of hippopotamid origin
【24h】

Early Miocene hippopotamids (Cetartiodactyla) constrain the phylogenetic and spatiotemporal settings of hippopotamid origin

机译：早期中新世河马（Cetartiodactyla）限制了河马起源的系统发育和时空环境

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The affinities of the Hippopotamidae are at the core of the phy-logeny of Cetartiodactyla (even-toed mammals: cetaceans, ruminants, camels, suoids, and hippos). Molecular phytogenies support Cetacea as sister group of the Hippopotamidae, implying-a long ghost lineage between the earliest cetaceans (～53 Ma) and the earliest hippopotamids (～16 Ma). Morphological studies have proposed two different sister taxa for hippopotamids: suoids (notably palaeochoerids) or anthracotheriids. Evaluating these phylogenetic hypotheses requires substantiating the poorly known early history of the Hippopotamidae. Here, we undertake an original morphological phylogenetic analysis including several "sui-form" families and previously unexamined early Miocene taxa to test previous conflicting hypotheses. According to our results, Morotochoerus ugandensis and Kulutherium rusingensis, until now regarded as the sole African palaeochoerid and the sole African bunodont anthracotheriid, respectively, are unambiguously included within the Hippopotamidae. They are the earliest known hippopotamids and set the family fossil record back to the early Miocene (～21 Ma). The analysis reveals that hippopotamids displayed an unsuspected taxonomic and body size diversity and remained restricted to Africa during most of their history, until the latest Miocene. Our results also confirm the deep nesting of Hippopotamidae within the paraphyletic Anthracotheriidae; this finding allows us to reconstruct the sequence of dental innovations that links advanced selenodont anthracotheriids to hippopotamids, previously a source of major disagreements on hippopotamid origins. The analysis demonstrates a close relationship between Eocene choeropo-tamids and anthracotheriids, a relationship that potentially fills the evolutionary gap between earliest hippopotamids and cetaceans implied by molecular analyses.
机译：河马科的亲和力是Cetartiodactyla（七趾哺乳动物：鲸类，反刍动物，骆驼，类固醇和河马）的植物学核心。分子植物遗传学支持C科作为河马科的姊妹群，这暗示着最早的鲸类（〜53 Ma）和最早的河豚（〜16 Ma）之间存在长的幽灵世系。形态学研究提出了两种针对河马的姊妹类群：suoids（特别是古软骨类）或anthracotheriids。要评估这些系统发育假设，需要证实鲜为人知的河马科的早期历史。在这里，我们进行了原始的形态学系统发育分析，包括几个“隋型”家族和以前未经检查的中新世早期分类群，以检验以前相互矛盾的假设。根据我们的结果，在河马科中明确地包括了迄今为止分别被认为是唯一的非洲古软骨和唯一的非洲布诺顿炭疽病的乌兰Morotochoerus ugandensis和Kulutherium rusingensis。它们是已知最早的河马，使家庭化石记录回溯到中新世（〜21 Ma）早期。分析表明，河马类动物的分类学和体型多样性均未曾怀疑，并且在它们的大部分历史中（直到最新的中新世之前）仍局限于非洲。我们的研究结果也证实了河马科在副生炭疽科中的深层嵌套。这一发现使我们能够重建将先进的亚硒酸盐类抗癌药与河马酰胺联系起来的牙科创新序列，后者以前是关于河马霉素起源的主要分歧的来源。该分析表明，始新世的胆碱类和炭疽类药物之间存在密切的联系，这种联系有可能填补了分子分析暗示的最早的河马类和鲸类之间的进化空白。

著录项

  • 来源
  • 作者

    Maeva Orliac; Jean-Renaud Boisserie; Laura MacLatchy; Fabrice Lihoreau;

  • 作者单位

    lnstitut des Sciences de Involution, Unite Mixte de Recherche 5554, Universite Montpellier 2, 34000 Montpellier, France;

    rnCentre Francais des Etudes Ethiopiennes/French Centre for Ethiopian Studies, Centre National de la Recherche Scientifique Unite de Service et de Recherche 3137, Addis Ababa, Ethiopia lnstitut International de Paleoprimatologie, Paleontologie Humaine: Evolution et Paleoenvironnements, Unite Mixte de Recherche 6046, Universite de Poitiers, F-86022 Poitiers, France;

    rnDepartment of Anthropology, University of Michigan, Ann Arbor, Ml 48109;

    rnlnstitut des Sciences de Involution, Unite Mixte de Recherche 5554, Universite Montpellier 2, 34000 Montpellier, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    africa; dental pattern; hippopotamoidea; paleobiogeography;

    机译：非洲;牙齿图案河马古生物学;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号