Abstract
Three brachiopod species, Bathymyonia neimongolica (Wang and Zhang 2003), Neospirifer moosakhailensis (Davidson 1862), and Spiriferellina fredericksi sp. nov., are described from the lower Kamiyasse Formation (Wordian), Kamiyasse-Imo area, southern Kitakami Mountains (South Kitakami Belt), northeast Japan. All three species are antitropical brachiopods, distributed in the transitional zone between the Boreal-Tethyan realms, which includes north China (Inner Mongolia), northeast China (Heilongjiang and Jilin), eastern Russia (South Primorye), and northeast Japan (South Kitakami Belt). Palaeobiogeographical data on the three species, assigned here to the Kamiyasse-Imo fauna, suggest that the South Kitakami region was located immediately east of North China (Sino-Korea) in the middle Permian (Wordian).
