Papers in Palaeontology, Volume (7), No (2), Year (2020-7) , Pages (1003-1042)

Title : ( Ostracods from the end‐Permian mass extinction in the Aras Valley section (north‐west Iran) )

Authors: Jana Gliwa , Marie Beatrice Forel , Sylvie Crasquin , Abbas Ghaderi , Dieter Korn ,

Citation: BibTeX | EndNote


The Aras Valley section (north‐west Iran) exposes a sedimentary succession that allows the study of ostracod diversity patterns during/across the end‐Permian mass extinction. For the present study, 59 samples were investigated for their ostracod abundances, which ranged from 4 to 31 500 specimens per 500 g. In 45 sample horizons, the ostracods were identified to the species level. In total, 3 425 specimens were determined and 62 species were identified, of which one genus and ten species are described for the first time: Fabalicypris veronicae Gliwa, sp. nov., Orthobairdia capuliformis Gliwa, sp. nov., Araxobairdia formosa Gliwa, gen. et sp. nov., Bairdiacypris kathleenae Gliwa, sp. nov., Eumiraculum mettei Gliwa, sp. nov., Liuzhinia julfensis Gliwa, sp. nov., Carinaknightina hofmanni Gliwa, sp. nov., Cavellina fosteri Gliwa, sp. nov., Cavellina hairapetiani Gliwa, sp. nov. and Hungaroleberis striatus Forel, sp. nov. The assemblages show, at the end‐Permian mass extinction event, a complete turnover from a low‐diversity Fabalicypris‐dominated pre‐extinction community to a more diverse Bairdiacypris‐dominated post‐extinction community. The turnover coincides with the significant temperature increase that was previously recorded from north‐west Iranian sections. The low diversity in the horizon immediately below the extinction horizon indicates that environmental changes, such as thermal stress, may have had an impact on the ostracod assemblages prior to the extinction event. In comparison with other diverse ostracod assemblages from the Palaeotethyan realm, the ostracods of the Aras Valley section are not associated with microbialites.


, Ostracods, Iran, end-Permian, extinction, diversity, thermal stress
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author = {Jana Gliwa and Marie Beatrice Forel and Sylvie Crasquin and Ghaderi, Abbas and Dieter Korn},
title = {Ostracods from the end‐Permian mass extinction in the Aras Valley section (north‐west Iran)},
journal = {Papers in Palaeontology},
year = {2020},
volume = {7},
number = {2},
month = {July},
issn = {2056-2799},
pages = {1003--1042},
numpages = {39},
keywords = {Ostracods; Iran; end-Permian; extinction; diversity; thermal stress},


%0 Journal Article
%T Ostracods from the end‐Permian mass extinction in the Aras Valley section (north‐west Iran)
%A Jana Gliwa
%A Marie Beatrice Forel
%A Sylvie Crasquin
%A Ghaderi, Abbas
%A Dieter Korn
%J Papers in Palaeontology
%@ 2056-2799
%D 2020