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首页> 外文期刊>Journal of Systematic Palaeontology >New Palaeogene cingulates (Mammalia, Xenarthra) from Santa Rosa,Peru and their importance in the context of South American faunas
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New Palaeogene cingulates (Mammalia, Xenarthra) from Santa Rosa,Peru and their importance in the context of South American faunas

机译：来自秘鲁圣罗莎的新古近代扣带虫（哺乳动物，Xenarthra）及其在南美动物区系中的重要性

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摘要

The record of Palaeogene cingulate xenarthrans in low latitudes is very poor. The cingulate fauna from the Yunia River near Santa Rosa in eastern Peru is important because it is one of the oldest known from the Palaeogene of Peru and because of its tropical latitudinal position. Although remains are scarce, we recognize three new taxa: two species of Astegotheriini (Dasypodidae); Parastegosimpsonia peruana gen. et sp. nov, of small size, related to Eocene species from Patagonia; and another new species, ?Parastegosimpsonia sp. nov., which consists of an incomplete osteoderm representing the largest species of this tribe. A third species, Yuruatherium tropicalis gen. et sp. nov., of indeterminate suprageneric rank, shares features with Machlydotherium Ameghino (Casamayoran-Tinguirirican SALMA - middle Eocene-early Oligocene of Patagonia) and is similar to Eocoleophorus Oliveira et al. (Deseadan SALMA - late Oligocene of Brazil). We assign 1 Machlydotherium intortum Ameghino (from the late Eocene of Patagonia) to Yuruatherium. Sediments bearing these cingulates also yielded rodents, marsupials and notoungulates, among the most frequent mammals. The absolute age of the sediments is unknown but an estimated age is inferred from studies of the mammalian assemblages. The age of the Santa Rosa local fauna is still controversial and given the groups taken into account, could be from Early Eocene to Late Oligocene. According to sequences of southern cingulate faunas (especially those of Dasypodidae), the cingulates from Santa Rosa also suggest an age between the Late Eocene and Early Oligocene. Nevertheless, the very low latitude of the Santa Rosa local fauna should be taken into account because in lower latitudes it is not uncommon to find taxa with a more generalized set of characters than those present in contemporary taxa from higher latitudes.
机译：在低纬度地区，古近纪扣带状黄土炭疽的记录非常差。秘鲁东部圣罗莎附近的尤尼亚河的扣带动物区系很重要，因为它是秘鲁古近纪中已知最古老的物种之一，并且因其热带纬向位置。尽管遗骸稀少，但我们认识到了三个新的分类单元：两种Astegotheriini（Dasypodidae）；另一种为Astegotheriini（Dasypodidae）。拟南芥属。等。 nov，体积小，与巴塔哥尼亚的始新世物种有关；和另一个新种，Parastegosimpsonia sp。十一月号，由代表该部落最大物种的不完整的真皮构成。第三种，热带尤里氏菌属。等。 nov。，具有不确定的附生资格等级，与Machlydotherium Ameghino（Casamayoran-Tinguirirican SALMA-巴塔哥尼亚的始新世中期渐新世）共享特征，并且与Eocoleophorus Oliveira等类似。 （Deseadan SALMA-巴西晚渐新世）。我们将1个Machlydotherium intortum Ameghino（来自巴塔哥尼亚始新世晚期）分配给Yuruatherium。在最常见的哺乳动物中，带有这些扣带的沉积物还产生了啮齿动物，有袋动物和非弓形动物。沉积物的绝对年龄是未知的，但是从哺乳动物组合的研究中可以推断出估计的年龄。圣罗莎（Santa Rosa）当地动物区系的年龄仍然存在争议，考虑到这些群体，可能是始于始新世到渐新世。根据南部扣带动物区系的序列（特别是Dasypodidae的种类），来自圣罗莎的扣带动物的年龄也介于晚始新世和渐新世之间。但是，应该考虑到圣罗莎当地动物群的极低纬度，因为在低纬度中，找到比现代高纬度中的当前分类群中的字符更具普遍性的分类群并不少见。

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  • 来源
    《Journal of Systematic Palaeontology》 |2013年第6期|727-741|共15页
  • 作者

    Martin Ricardo Ciancio; Alfredo A. Carlini; Kenneth E. Campbell; Gustavo J. Scillato-Yane;

  • 作者单位

    Division Paleontologia de Vertebrados, Museo de La Plata, FCNyM, UNLP Paseo del Bosque s B1900FWA, La Plata, Argentina,Cdtedra de Anatomia Comparada, Facultad de Ciencias Naturalesy Museo, Universidad Nacional de La Plata, Argentina;

    Division Paleontologia de Vertebrados, Museo de La Plata, FCNyM, UNLP Paseo del Bosque s B1900FWA, La Plata, Argentina,Cdtedra de Anatomia Comparada, Facultad de Ciencias Naturalesy Museo, Universidad Nacional de La Plata, Argentina;

    Vertebrate Zoology, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007;

    Division Paleontologia de Vertebrados, Museo de La Plata, FCNyM, UNLP Paseo del Bosque s B1900FWA, La Plata, Argentina;

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  • 正文语种 eng
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  • 关键词

    Cingulata; Palaeogene; Astegotheriini; low latitudes; diversity; Peru, Amazonia;

    机译：Cingulata;古近纪;Astegotheriini;低纬度;多样性秘鲁;亚马逊;

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