Leymeriellidae (Cretaceous ammonites) from the lower Albian of Esfahan and Khur (Central Iran) |
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| Institution: | 1. School of Mining Engineering, University College of Engineering, University of Tehran, P.O. Box 11365-4563, Tehran, Iran;2. Senckenberg Naturhistorische Sammlungen Dresden, Museum für Mineralogie und Geologie, Sektion Paläozoologie, Königsbrücker Landstr. 159, D-01109 Dresden, Germany;1. Département de géologie et paléontologie, Muséum d''histoire naturelle de la ville de Genève, Route de Malagnou 1, Case Postale 6434, CH-1211 Genève 6, Switzerland;2. Museu de Ciències Naturals de Barcelona (Paleontologia), Parc de la Ciutadella s/n, 08003 Barcelona, Spain;1. Institute of Biology and Soil Science, Far Eastern Branch, Russian Academy of Sciences, 159 Prospect Stoletiya Vladivostoka, Vladivostok 690022, Russia;2. Université Lyon 1 and UMR5276 of the CNRS, 7 rue Dubois, Campus de la Doua, F69622 Villeurbanne cedex, France;1. Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ciencias Geológicas, Ciudad Universitaria, Pabellón II, Intendente Güiraldes 2160, C1428EHA, Ciudad Autónoma de Buenos Aires, Argentina;2. CONICET-Universidad de Buenos Aires, Instituto de Geociencias Básicas, Ambientales y Aplicadas de Buenos Aires (IGeBA), Argentina;3. Shell Exploration and Production Incorporated, Shell Houston Technology Center, 3333 Highway 6 South, Houston, TX 77082, USA;1. Faculty of Sciences of Tunis, Tunis El Manar University, 1060, Tunisia;2. Faculty of Sciences of Gafsa, campus universitaire, 2112 Sidi Ahmed Zarroug, Tunisia;3. Entreprise tunisienne d’activités pétrolières (Tunisian company of petroleum activities), 2053 Charguia II, Tunisia;1. Department of Geology, Faculty of Earth Science, Shahid Beheshti University, Tehran, Iran;2. UMR CNRS MNHN UPMC - CR2P, université Pierre-et-Marie-Curie, Paris, France;1. Laboratory of Systematic of Insects, Zoological Institute, Russian Academy of Sciences, Universitetskaya Emb., 1, 199034 St. Petersburg, Russia;2. Institut de Systématique, Évolution, Biodiversité, ISYEB – UMR 7205 – CNRS, MNHN, UPMC, EPHE, Muséum national d’Histoire naturelle, Sorbonne Universités, 57 rue Cuvier, CP 50, Entomologie, F-75005, Paris, France |
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| Abstract: | Leymeriellid ammonite faunas are described from northeast of Esfahan and the Khur area (Central Iran). The faunas comprise Leymeriella (L.) tardefurcata, L. (L.) germanica and L. (L.) acuticostata? as well as L. (Neoleymeriella) regularis, L. (N.) diabola and L. (Neoleymeriella) pseudoregularis?. The leymeriellids of Iran are closely related to faunas from northwest Europe, the Vocontian Basin and Transcaspia (Mangyschlak) and thus allow for biostratigraphic correlations, indicating the earliest Albian Leymeriella tardefurcata Zone with its superimposed L. acuticostata and L. regularis subzones. We suggest that the sudden appearance of common representatives of the genus Leymeriella in the northern and Central Iranian basins (Leymeriella acme) can be used as a useful proxy marker to define the base of the Albian Stage in Iran. |
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| Keywords: | Cretaceous Lower Albian Iran Ammonites Leymeriellidae Biostratigraphy |
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