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首页> 外文期刊>Palaios: An International Journal of the Society of Economic Paleontologists & Mineralogists >Taphonomic analyses of an early eocene litolophus (perissodactyla, chalicotherioidea) assemblage from the erlian basin, inner mongolia, China
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Taphonomic analyses of an early eocene litolophus (perissodactyla, chalicotherioidea) assemblage from the erlian basin, inner mongolia, China

机译：来自中国内蒙古二连盆地的始新世斜新石（perissodactyla，chalicotherioidea）组合的速谱分析

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摘要

The mammalian fauna of the so-called chalicothere pit, lower Eocene basal Arshanto Formation, Erlian Basin, Inner Mongolia, comprises at least eight species, of which Litolophus gobiensis is the most abundant large mammal, represented by at least 24 individuals and 1252 specimens of skulls, mandibles, and postcranial elements. The Litolophus assemblage is dominated by young adult individuals, while juveniles are under-represented, an age profile that conforms to the theoretical model of a catastrophic assemblage. The assemblage is characterized by skeletal elements with limited weathering and moderate disarticulation, and a paucity of isolated teeth, suggesting that the carcasses were probably exposed to the environment after death for only a brief period. Fluvial activity was prominent and had sufficient energy to align most long bones of Litolophus (～153.1 kg in mean value) in a NNE-SSW direction. Most elements in the assemblage belong to Voorhies Groups II and/or III, while elements of Group I are rare. In addition, the Litolophus carcasses were evidently disturbed by predators and/or scavengers before burial. Damage to the ends of long bones is unevenly distributed, probably reflecting both preferential feeding behavior by predators or scavengers and the timing of epiphyseal fusion in Litolophus. The scarcity of juvenile individuals can also partially be attributed to predation or scavenging; however, it seems unlikely that the chalicothere pit was a scavenger den.
机译：内蒙古二连盆地的始新世下部始新世基底阿尔山托组的所谓的白斑坑哺乳动物至少有八种，其中Litolophus gobiensis是最丰富的大型哺乳动物，至少有24个个体和1252个标本代表头骨，下颌骨和颅后元素。 Litolophus组合主要由年轻人组成，而青少年的代表性不足，其年龄分布符合灾难性组合的理论模型。这种组合的特征是骨骼元素具有有限的风化和适度的脱节性，并且缺乏孤立的牙齿，这表明尸体在死后可能仅在短时间内暴露于环境。河流活动突出，并具有足够的能量使Nitol-SSW方向的大部分Litolophus长骨对齐（平均值约为153.1 kg）。组合中的大多数元素属于Voorhies组II和/或III，而组I的元素很少。另外，在埋葬前，食肉动物和/或清道夫明显地扰乱了Litolophus尸体。长骨末端的损伤分布不均匀，这可能反映了捕食者或清除剂的优先进食行为以及石竹的骨phy融合时间。未成年人的稀缺也可以部分归因于掠夺或掠夺。但是，查理索特坑似乎不太可能是清道夫窝。

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