New remains of Mammuthus trogontherii from the Early Pleistocene Nihewan beds at Shanshenmiaozui, Hebei
New remains of Mammuthus trogontherii from the Early Pleistocene Nihewan beds at Shanshenmiaozui, Hebei
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DOI：
10.1016/j.quaint.2011.07.035
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发表时间：
2012-03
影响因子：
2.2
通讯作者：
Hao-wen Tong
中科院分区：
文献类型：
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作者：
Hao-wen Tong
近年来，泥河湾盆地山神庙嘴这一新地点发现了丰富的猛犸象化石材料。这些材料包括迄今为止发现的最完整的幼年下颌骨和一些猛犸象的颅后骨骼。根据与邻近小场梁旧石器时代遗址的初步对比，该含化石地层的地质年龄约为1.3 Ma。新材料在以下方面代表了比真正的猛犸象更原始的形态：相对较大的dp1、相对较低的层状频率和较厚的牙釉质层。颅后骨对于分类测定和进化评估没有多大帮助；这可能主要是由于生长周期长和显着的个体发育变异所致。
Rich fossil materials of Mammuthus trogontherii have been recovered from a new locality, Shanshenmiaozui, in the Nihewan Basin during the past several years. The materials include the most complete juvenile mandible ever discovered and some postcranial bones of Mammuthus trogontherii. The geologic age of the fossil bearing strata is about 1.3 Ma based on the preliminary correlation with the neighboring Paleolithic site at Xiaochangliang. The new materials represent a form more primitive than the true woolly mammoth in the following aspects: relatively larger dp1, relatively lower lamellar frequency and thicker enamel layer. The postcranial bones are not very helpful in taxonomic determination and evolutionary assessment; this is probably mainly due to the long period of growth and remarkable ontogenetic variations.