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首页> 外文期刊>Anais da Academia Brasileira de Ciencias >The Dasypodidae (Mammalia, Xenarthra) from the Urso Fóssil Cave (Quaternary), Parque Nacional de Ubajara, State of Ceará, Brazil: paleoecological and taxonomic aspects
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The Dasypodidae (Mammalia, Xenarthra) from the Urso Fóssil Cave (Quaternary), Parque Nacional de Ubajara, State of Ceará, Brazil: paleoecological and taxonomic aspects

机译：来自巴西塞阿拉州乌巴哈拉国家公园的Urso化石洞穴（第四纪）的Dasypodidae（哺乳动物，Xenarthra）：古生态和分类学方面

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摘要

This paper deals with xenarthrans osteoderms assigned toDasypus aff. D. novemcinctus,Euphractus sexcinctus and Cabassous sp. The material was collected in subsurface, from 0.10 to 0.60 m in the Urso Fóssil Cave, Parque Nacional de Ubajara, State of Ceará, northeastern Brazil. The ages of sediment samples from levels 4 and 5 (depths of 0.40 and 0.50 m) were determined by thermoluminescence technique, and indicated ages of 8,000 and 8,200 years BP for each layer respectively. The presence in these layers of early Holocene xenarthrans taxa can contribute to the understanding of the biotic evolution of the northwest region of Ceará during the last 10,000 years. Two of the three identified taxa still occur in the region: Dasypus novemcinctus andEuphractus sexcinctus. The Dasypodidae fauna here reported includes animals with generalist feeding habits and current wide geographical distribution. It is suggested, therefore, that the climatic and environmental conditions in the early Holocene were very similar the actual ones, and that the absence of Cabassous may be conditioned to other factors, such as anthropogenic action and loss of habitat by fragmentation of the vegetation.
机译：本文涉及分配给Dasypus aff的xenarthrans真皮。 D. novemcinctus，Euphractus sexcinctus和Cabassous sp。该材料收集在巴西东北部塞阿拉州乌巴哈拉公园国家公园的UrsoFóssil洞穴地下0.10至0.60 m处。通过热致发光技术确定了4级和5级（0.40和0.50 m深度）的沉积物样品的年龄，并指出每层的年龄分别为8,000和8,200年BP。这些全新世的全新世生土生炭疽类群的存在可以帮助人们了解近一万年来塞阿拉州西北部地区的生物演化。三个已识别的分类单元中的两个仍在该区域中出现：Dasypus novemcinctus和Euphractus sexcinctus。此处报道的sy科动物区系包括具有普遍摄食习惯和当前广泛的地理分布的动物。因此，有人建议，全新世早期的气候和环境条件与实际情况非常相似，而无岩蓬的出现可能受到其他因素的影响，例如人为作用和植被破碎造成的栖息地丧失。

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