Some additional Wuchiapingian (Late Permian) ammonoids from the Southern Kitakami Massif, Northeast Japan

Abstract

Permian ammonoids, Dzhulfoceras cf. furnishi, D. sp. and Stacheoceras? sp., are described from the Southern Kitakami Massif, Northeast Japan. The first two and the last were collected from the Lower and Middle Toyoman Series, respectively. The occurrence of Dzhulfoceras supports the previous correlation of the Lower Toyoman Series with the Wuchiapingian (Dzhulfian). This occurrence of Dzhulfoceras is the first record of the genus outside the Middle East and supports the conclusion that a close paleobiogeographic relationship existed between the Middle East and the Southern Kitakami in Late Permian time.