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Published online by Cambridge University Press: 20 May 2016
A brachiopod fauna from the upper part of the Nakazato Formation, southern Kitakami Mountains, northeast Japan, is nearly similar to the fauna from the top of the Yikewusu Formation (upper Eifelian) in the Zhusilenghaierhan region, western Inner Mongolia. The Nakazato fauna is systematically described and consists of 10 species and four indeterminate species assigned to 14 genera. Two new species are designated Maoristrophia subquadrata and Malurostrophia sugiyamai. Brachiopods from the upper part of the Nakazato Formation suggest that the age of the fauna is likely Eifelian.