Late Permian nautiloids from Julfa (NW Iran)
Abstract
The Late Permian Julfa and Ali Bashi formations of sections near Julfa (NW Iran) have yielded diverse nautiloid assemblages. These come from the early Wuchiapingian Araxoceras Beds (19 species), the late Wuchiapingian Vedioceras Beds (six species), the early Changhsingian Dzhulfites Beds (three species) and the late Changhsingian Paratirolites Limestone (two species). These species belong to 20 genera, eight of which are new: Fididomatoceras gen. nov., Azarinautilus gen. nov., Serometacoceras gen. nov., Alibashinautilus gen. nov., Tardunautilus gen. nov., Corotainoceras gen. nov., Celeroliroceras gen. nov., Julfanautilus gen. nov. A total of 30 species are described, of which 24 are new: Domatoceras elegantulum sp. nov., Domatoceras multituberculatum sp. nov., Permodomatoceras hamdii sp. nov., Fididomatoceras intracostatum gen. et sp. nov., Azarinautilus nahidae gen. et sp. nov., Aifinautilus hebes sp. nov., Serometacoceras cingulum gen. et sp. nov., Serometacoceras inflatum gen. et sp. nov., Serometacoceras parvituberculatum gen. et sp. nov., Serometacoceras arasense gen. et sp. nov., Alibashinautilus vetus gen. et sp. nov., Alibashinautilus ambiguus gen. et sp. nov., Tardunautilus nimius gen. et sp. nov., Tardunautilus minor gen. et sp. nov., Tainoceras admonens sp. nov., Tainoceras latecostatum sp. nov., Tainoceras unitum sp. nov., Corotainoceras inerme gen. et sp. nov., Tainionautilus deinceps sp. nov., Liroceras choopani sp. nov., Celeroliroceras celere gen. et sp. nov., Peripetoceras parum sp. nov., Julfanautilus ashourii gen. et sp. nov. and Julfanautilus hairapetiani gen. et sp. nov. The new family Julfanautilidae fam. nov. is erected to accommodate the species of Julfanautilus gen. nov. With 30 species, the assemblage from the area around Julfa is one of the most diverse Late Permian occurrences of coiled nautiloids. With 25 Wuchiapingian species alone, it is the most species-rich assemblage for this interval.
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