@article{oai:niigata-u.repo.nii.ac.jp:00006884,
 author = {Tazawa, Jun-ichi},
 journal = {Science reports of Niigata University. (Geology), Science reports of Niigata University. (Geology)},
 month = {Mar},
 note = {Two Permian brachiopod species, Leptodus sp. and Spiriferella keilhavii are described from a sandstone block of the Usuginu Conglomerate in the Ichinoseki district, southern Kitakami Mountains, northeast Japan. The occurrence of a Tethyan-type brachiopod Leptodus together with a Boreal-type brachiopod Spiriferella suggests that the source area of the Usuginu Conglomerate was probably a continental shelf bordering the eastern margin of the Sino-Korean Continent in Middle Permian time.},
 pages = {1--13},
 title = {Leptodus and Spiriferella (Permian Brachiopoda) from the Usuginu Conglomerate, southern Kitakami Mountains, northeast Japan},
 volume = {14},
 year = {1999}
}