Brachiopods from the Upper Permian Takakurayama Formation, Abukuma Mountains, northeast Japan
Brachiopods from the Upper Permian Takakurayama Formation, Abukuma Mountains, northeast Japan
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发表时间：
2008-03
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通讯作者：
J. Tazawa
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作者：
J. Tazawa
报道了日本东北部北上南带武间山高仓山地区上二叠统高仓山组腕足动物区系，共20属26种。该区系包括两个新种：岩瓦氏Chonetinella iwakiensis和transversa Chonetinella。高村山动物群是北-特提斯混合动物群，与华北（内蒙古）、东北（黑龙江和吉林）、俄罗斯东部（滨海南部）、日本东北部（北上南带的北上山脉南部）、日本中部（飞驒Gaien带的森武）和日本西南部（飞驒Gaien带的Mizukoshi）的中晚二叠世腕足动物群有关。这些地区可能位于中晚二叠世与华北北部和东部边缘接壤的陆架或斜坡上的大型连续沉积盆地内。
A brachiopod fauna, consisting of 26 species in 20 genera, is described from the Upper Permian (Lopingian) Takakurayama Formation of the Takakurayama area in the Abukuma Mountains, South Kitakami Belt, northeast Japan. This fauna includes two new species, Chonetinella iwakiensis and Chonetinella transversa. The Takakurayama fauna is a BorealTethyan mixed fauna and allied with the Middle to Late Permian brachiopod faunas of North China (Inner Mongolia), Northeast China (Heilongjiang and Jilin), eastern Russia (South Primorye), northeast Japan (southern Kitakami Mountains in the South Kitakami Belt), central Japan (Moribu in the Hida Gaien Belt) and southwest Japan (Mizukoshi in the Hida Gaien Belt). These regions were probably located within a large continuous sedimentary basin on continental shelf or slope bordering the northern and eastern margins of North China in the Middle to Late Permian.