著者所属：Department of Environmental Studies, Faculty of Integrated Arts and Sciences, Hiroshima University Department of Earth Science, Faculty of Culture and Education, Saga University
A new cephalopod species, Dolorthoceras nakazawai (Orthocerida : Pseudorthoceratidae), is described from the Permian Mizuyagadani Formation, Central Japan. Its Kazanian age, based on a fusulinid species, makes this the youngest record of Dolorthoceras. This is the first undoubted occurrence of the genus in Japan.
