Two brachiopod species, a Boreal element Kochiproductus sp. and a Tethyan element Leptodus nobilis (Waagen), are described from the Middle Permian (Wordian) Oyakejima Formation of the Obama area, South Kitakami Belt, northeast Japan. The stratigraphical and geographical distributions of the genus Kochiproductus and Leptodus nobilis are summarized.
Science reports of Niigata University. (Geology) = Science reports of Niigata University. (Geology) 18 25-39, 2003-03