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The ammonoids from the Late Permian Paratirolites Limestone of Julfa (East Azerbaijan, Iran)

2015; Taylor & Francis; Volume: 14; Issue: 10 Linguagem: Inglês

10.1080/14772019.2015.1119211

1478-0941

Dieter Korn, Abbas Ghaderi, Lucyna Leda, Martin Schobben, Ali Reza Ashouri,

Geology and Paleoclimatology Research

AbstractThe Changhsingian (Late Permian), 4 to 5 m thick Paratirolites Limestone has yielded diverse ammonoid assemblages composed of the genera Neoaganides, Pseudogastrioceras, Dzhulfites, Paratirolites, Julfotirolites, Alibashites, Abichites, Stoyanowites and Arasella. The succession of ammonoid species allows for a subdivision of the rock unit into eight biozones, in ascending order: Dzhulfites zalensis Zone, Paratirolites trapezoidalis Zone, Paratirolites kittli Zone, Stoyanowites dieneri Zone, Alibashites mojsisovicsi Zone, Abichites abichi Zone, Abichites stoyanowi Zone and Arasella minuta Zone. The following 20 new species are described by two of us (DK and AG): Neoaganides ultimus sp. nov., Pseudogastrioceras relicuum sp. nov., Dzhulfites zalensis sp. nov., Dzhulfites hebes sp. nov., Paratirolites coronatus sp. nov., Paratirolites birunii sp. nov., Paratirolites quadratus sp. nov., Paratirolites multiconus sp. nov., Paratirolites serus sp. nov., Julfotirolites kozuri sp. nov., Alibashites ferdowsii sp. nov., Alibashites uncinatus sp. nov., Alibashites stepanovi sp. nov., Abichites subtrapezoidalis sp. nov., Abichites alibashiensis sp. nov., Abichites ariaeii sp. nov., Abichites paucinodus sp. nov., Abichites shahriari sp. nov., Abichites terminalis sp. nov. and Stoyanowites aspinosus sp. nov. After the time-equivalent Chinese occurrences, the material described here is the most diverse assemblage known from the critical interval before the end-Permian mass extinction.http://zoobank.org/urn:lsid:zoobank.org:pub:75D71EE8-27A2-48B1-805B-52E98578A7B8Keywords: Late PermianChanghsingianParatirolites LimestoneAmmonoideaIranbiostratigraphy AcknowledgementsWe want to express our thanks to Adel Najafzadeh, Mehdi Abassi and Hossein Hobbi (Aras Free Zone Office, Julfa) for their support with the field sessions. Dieter Weyer (Berlin) is acknowledged for providing ammonoid material from Zal. We further acknowledge the intensive preparation efforts performed by Evelin Stenzel and Markus Brinkmann (Berlin), and the photography of the specimens by Jonas Jahn, Sebastian Sladeczek, Jana Suchocka and Sabine Zachert (Berlin). Many thanks also to Sonny A. Walton (Berlin) for checking the English. DK, LL and MS acknowledge financial support which was provided by the Deutsche Forschungsgemeinschaft (DFG; projects Ko1829/12-1 and Ko2011/8-1). We gratefully acknowledge the constructive peer reviews by Arnaud Brayard (Dijon) and Masayuki Ehiro (Sendai).Supplemental materialSupplemental material for this article can be accessed here at http://dx.doi.org/10.1080/14772019.2015.1119211