Abstract
An early Asselian ammonoid fauna comprising nine species belonging to nine genera (Agathiceras, Neoglaphyrites, Somoholites, Shumardites, Vidrioceras, Almites, Eoasianites?, Boesites and Metapronorites) and one indeterminable Adrianitidae is described from the Uyamanoro Formation of the Taishaku Limestone at Miharanoro in the Akiyoshi Belt (late Permian accretionary belt), Southwest Japan. The fauna includes four new species: Shumardites umbilicatus, Vidrioceras ellipticum, Almites hayasakai and Boesites biconcavus. The age of the fauna is determined to be early Asselian based on the fusulinoidean biostratigraphy. In addition to the previously known late Asselian taxa, the number of Taishaku Asselian ammonoid genera is now ten genera. This is the only known Asselian ammonoid fauna from the mid-Panthalassa Ocean. The ammonoid faunal composition of this region, the Mid-Panthalassa Realm, is closely related to those of Paleotethyan (Pamirs and South China), Uralian and American (eastern Panthalassa) realms.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.