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首页> 外文期刊>Bulletin of the Osaka Museum of Natural History >Occurrence of a suid mandible from the Pliocene Ueno Formation,Mie Prefecture, central Japan
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Occurrence of a suid mandible from the Pliocene Ueno Formation,Mie Prefecture, central Japan

机译：日本中部三重县上新世上野组的下颌下颌骨发生

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摘要

A suid mandible was discovered from the excavation site for fossil footprints onthe northern bank of the Hattori River at Hirata, Iga, Mie Prefecture, about four years afterthe finish of the excavation. It records the only mammal bone known from the site. Themandible occurred from Bed B in the sediments of the site which are included in the upperpart of the Ueno Formation of the Kobiwako Group. This bed is correlative with thepaleomagnetically-dated standard sequence of the group, and is dated to about 3.6 Ma. Themandible comprises left and right horizontal rami which are united anteriorly at thesymphysis. Both of the rami have three molars, and are tilted lingually by post-burial verti-cal stress. The morphology of the mandible and molars is similar to that of the living speci-mens of the wild boar (Sus scrofa), but is also different in smaller and simpler M3 and soon. The mandible probably belongs to the tribe Suini or Potamochoerini of the subfamilySuinae.
机译：开挖完成约四年后，在三重县伊贺市平田市Hattori河北岸的开挖地点发现了一个下颌下颌化石足迹。它记录了该地点已知的唯一哺乳动物骨骼。下颌骨是从该床沉积物中的B床发生的，这些沉积物包括在Kobiwako组上野组的上部。该床与该组的古磁性年代标准序列相关，可追溯到3.6 Ma。下颌骨包括左和右水平支，它们在前突处合在一起。两个拉米都有三个臼齿，并且在埋葬后的垂直应力作用下向舌侧倾斜。下颌和臼齿的形态与野猪（Sus scrofa）的活体标本相似，但在较小和较简单的M3中也有所不同。下颌骨可能属于Suinae家族的Suini或Potamochoerini部落。

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