Mansoureh Ghobadi Pour

Golestan University

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Leonid E. Popov

National Museum Wales

Lars E. Holmer

Northwest University

J. Javier Álvaro

Instituto de Geociencias

Zhifei Zhang

State Key Laboratory of Continental Dynamics

Vachik Hairapetian

Islamic Azad University, Isfahan

Zhiliang Zhang

Northwest University

Hadi Jahangir

Nanjing Institute of Geology and Paleontology

Mohammad‐Reza Kebria‐ee Zadeh

Payame Noor University

David H. Evans

University of Leicester

Mohammad H. Ehsani

University of Tehran

Cooperative Institutions

National Museum Wales

Uppsala University

Chinese Academy of Sciences

Centre National de la Recherche Scientifique

Cardiff University

Nanjing Institute of Geology and Paleontology

Czech Academy of Sciences, Institute of Geology

Golestan University

State Key Laboratory of Continental Dynamics

Northwest University

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A new orthide brachiopod genus from the Middle Ordovician of the Alborz Mountains, Iran

GFF (2017)

Mohammad‐Reza Kebria‐ee Zadeh Leonid E. Popov Mansoureh Ghobadi Pour

A new brachiopod genus and species Simehorthis fascicostellata is described from the upper Darriwilian part of the Lashkarak Formation of eastern Alborz in northern Iran. The taxon appears as a minor component of the Saucrorthis Brachiopod Association and later proliferated as a distinct part of a rich brachiopod-echinoderm fauna in the latest Darriwilian. Simehorthis together with Hesperorthis are the only genera of the Family Hesperorthidae yet documented from the Middle Ordovician. Also there was no previous record of the occurrence of Hesperorthidae in association with the Saucrorthis Fauna, and in the Middle Ordovician of the Austrolasian sector of Gondwana and associated terranes, while Hesperorthis was mainly confined to peri-Iapetus locations in the Darriwilian.http://zoobank.org/urn:lsid:zoobank.org:act:B6459870-B591-4A48-B9B5-9F8BA9EC5A03http://zoobank.org/urn:lsid:zoobank.org:pub:ABC9EAEF-5489-453B-AB9C-E85C145931D3

Baltica

10.1080/11035897.2017.1347197

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Citations (1)

Emergence of the 'Saucrorthis' Fauna in the middle Ordovician of Northern Iran

Leonid E. Popov Mohammad Reza Kebriaee-Zadeh Mansoureh Ghobadi Pour

Sixteen rhynchonelliform brachiopod taxa, including 'Anisopleurella antiqua' n. sp., 'Bellimurina fluctuosa' n. sp., 'Dulankarella hyrcanica' n. sp., 'Lepidomena multiplicata' n. sp., 'Orthis dehmollaensis' n. sp., 'Phragmorthis shahrudensis' n. sp., and 'Rogorthis'? 'oriens' n. sp., are documented from the lower part of the Lashkarak Formation (Darriwilian, 'Lenodus pseudoplanus' Conodont Zone), exposed in the southern foothills of the eastern Alborz Mountains of Iran, in the vicinity of Damghan and Shahrud. This mid-shelf brachiopod association shows strong links with the contemporaneous 'Saucrorthis' Fauna of South China and Sibumasu. It sharply replaces the low diversity shallow-water brachiopod and trilobite association characteristic of the cold-water 'Neseuretus' Biofacies, signifying substantial warming and sea-level rise in the area, which occurred synchronously with the Mid Darriwilian Positive Carbon Isotope Excursion. The biogeographical analysis supports assignment of the Iranian brachiopod association to the 'Saucrorthis' Fauna with its closest link being to the contemporaneous brachiopod fauna of South China and Sibumasu. There is also no evidence for the existence of a pantropical Low Latitude Province through the Darriwilian, when shallow shelf faunas of Laurentia and tropical peri-Gondwana were widely separated.

Trilobite

Laurentia

Baltica

Conodont

Foothills

Excursion

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Citations (16)

Cambrian (Furongian) rhynchonelliform brachiopods from the Eastern Alborz Mountains, Iran

Bulletin of Geosciences (2013)

Leonid E. Popov Mohammad‐Reza Kebria‐ee Zadeh Mansoureh Ghobadi Pour Lars E. Holmer T L Modzalevskaya

The Cambrian (Furongian) shallow water carbonates in the Mila Formation in the Tuyeh-Darvar area (eastern Alborz, northern Iran) contain numerous shell beds, entirely composed of disarticulated valves of the billingsellide brachiopods Billingsella?fortis nov.and Hyrcanostrophia tuyehensis gen.et sp.nov.Higher up in the Mila Formation, the shallow water carbonates are replaced by nodular limestones, deposited in an open marine environment, containing Palaeostrophia tecta Nikitin & Popov, 1983 and the early polytoechioid Darvaretoechia prisca gen.et sp.nov.These two different brachiopod assemblages are assigned to the oligotaxic Billingsella and Palaeostrophia associations, respectively, and these associations are considered to represent precursors to the brachiopod-dominated benthic assemblages of the Palaeozoic Evolutionary Fauna.The new brachiopod faunas from the Alborz Terrane are closely similar to contemporaneous Furongian faunas from the Australasian sector of Gondwana, in particular, to those from South China and the Kazakhstanian terranes.

10.3140/bull.geosci.1393

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Citations (12)

The Ordovician of the Middle East (Iran, Afghanistan, Pakistan)

Geological Society London Special Publications (2022)

Mansoureh Ghobadi Pour Leonid E. Popov

Abstract Ordovician studies in Iran have shown significant progress since the beginning of the century. A number of individual faunas have been documented and a biostratigraphical framework based on conodonts, chitinozoans, acritarchs and trilobites developed. Correlation of Ordovician successions with the International Chronostratigraphic Chart has been significantly improved, and the position of the series and stage boundaries can be recognized with greater precision. While geographical proximity to temperate latitude Gondwana is apparent for most Iranian terranes, biogeographical links of Alborz and Kopet-Dagh with South China prevailed through the Early–Middle Ordovician. In Pakistan, Ordovician deposits have a restricted distribution in the Karakorum block (Chitral). Here they are represented by the Yarkhun and Vidiakot formations with Floian–Darriwilian acritarchs, chitinozoans and early Darriwilian conodonts. In Peshawar District of the North-West Frontier Province, an Early–Middle Ordovician age is likely for the Misri Banda Quartzite with Cruziana rugosa trace fossils. It is overlain conformably by carbonates of the Panjpir Formation, which has an inferred Middle Ordovician–Silurian age. Presently available information on the Ordovician of Afghanistan is mostly based on reconnaissance studies performed almost half a century ago, and a few monographed Early and Late Ordovician faunas.

Conodont

Acritarch

10.1144/sp533-2022-149

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Citations (7)

Furongian Linguliform Brachiopods from the Alborz Mountains, Iran

Memoir ... of the Association of Australasian Palaeontologists (2009)

Leonid E. Popov Mansoureh Ghobadi Pour Mehri Hosseini Lars E. Holmer

Micromorphic linguliform brachiopods are described for the first time from the Furongian part of the Cambrian Mila Formation, eastern Alborz Mountains, Iran. The assemblage is dominated by acrotretides, including Dactylotreta lamellosa n. sp. and Ottenbyella hyrcanica n. sp. as well as species of the new genera Tapuritreta (T. angusta n. sp.) and Sadrocarta (S. delicatus). The siphonotretide Siphonobolus sp. also occurs in abundance, which is unusual for Furongian lingulate faunas. The newly discovered assemblage shows little similarity to contemporaneous faunas of Laurentia, Baltica and Kazakhstanian terranes, but S. delicatus is also known from the middle Furongian Series of the Malyi Karatau Range in southern Kazakhstan.

Baltica

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Laurentia

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Citations (10)

Reassessment of the early Triassic lingulid brachiopod ‘Lingula’ borealis Bittner, 1899 and related problems of lingulid taxonomy

GFF (2016)

Lars E. Holmer Leonid E. Popov Inna A. Klishevich Mansoureh Ghobadi Pour

The Early Triassic (late Induan to early Olenekian) Lingula borealis Bittner, from the Russkii Island on the Pacific cost of south-eastern Russia is revised, based on re-examination of the type material. Although this species, like most described Triassic lingulids, has remained very poorly understood due to the lack of information on important characters, such as musculature and mantle canals, it has been commonly recorded in subsequent studies and included in attempts at understanding the patterns of extinction and recovery at around the Permian–Triassic boundary. Linguliform brachiopods are some of the notable survivors of this significant mass extinction event. Lingula borealis has previously been referred to Lingularia and provisionally synonymised with Lingularia similis Biernat & Emig. Here, it is shown that it differs from Lingularia similis mainly in characters of mantle canals, musculature and most importantly in details of the pedicle nerve impression. In Lingularia borealis, the impression of the pedicle nerve is symmetrical and goes almost straight between the individual ventral umbonal muscle scars, whereas in Lingularia similis it is asymmetrically positioned towards the smaller left component of the ventral umbonal muscle scar. Shell structures and details of preserved ontogenies have also proven to be important for the discrimination of lingulid taxa, but cannot be provided from the types of Lingularia borealis.

Early Triassic

Extinction (optical mineralogy)

10.1080/11035897.2016.1149216

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Citations (5)

First record of silicified Cambrian (Furongian) rhynchonelliform brachiopods from the Mila Formation, Alborz Range, Iran

Memoir ... of the Association of Australasian Palaeontologists (2012)

Leonid E. Popov Mansoureh Ghobadi Pour Mohammad Reza Kebria-Ee Zadeh Saeid Shahbeik

The discovery of a small rhynchonelliform brachiopod fauna of late Cambrian (Furongian) age, dominated by early pentamerids, is reported from the Mila Formation (Member 4) in the eastern Alborz Range of Iran. Two brachiopod associations are recognised. The first, dominated by the eostrophiid Syntrophioides tersus n. sp. in association with Billingsella aff. seletensis Nikitin as a minor component, occurs in characteristic shell beds composed primarily of disarticulated pentameride shells. The second association is characterised by Billingsella? uniplicata n. sp., Palaeostrophia shahrudensis n. sp. and Plectotrophia tenuis n. sp. and also dominated by early syntrophioids. The late Furongian age of the fauna is confirmed by the occurrence of trilobites characteristic of the Alborsella Biozone. Most of the genera in the assemblage had a pantropical distribution during the Furongian, except Syntrophioides, which was previously known only from the middle Cambrian of Laurentia.

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Laurentia

Pantropical

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Citations (8)

Chapter 19 Global Cambrian trilobite palaeobiogeography assessed using parsimony analysis of endemicity

Figshare (2016)

J. Javier Álvaro Per Ahlberg Loren E. Babcock Osvaldo L. Bordonaro Duck K. Choi

Palaeobiogeographical data on Cambrian trilobites obtained during the twentieth century are combined in this paper to evaluate palaeoceanographic links through c. 30 myr, once these arthropods biomineralized. Worldwide major tectonostratigraphic units are characterized at series intervals of Cambrian time and datasets of trilobite genera (629 for Cambrian Series 2, 965 for Cambrian Series 3, and 866 for the Furongian Series) are analysed using parsimony analysis of endemicity. Special attention is given to the biogeographical observations made in microcontinents and exotic terranes. The same is done for platform-basinal transects of well-known continental margins. The parsimony analysis of endemicity analysis resulted in distinct palaeogeographical area groupings among the tectonostratigraphic units. With these groupings, several palaeobiogeographical units are distinguished, which do not necessarily fit the previously proposed biogeographical realms and provinces. Their development and spatial distributions are broadly controlled by Cambrian palaeoclimates, palaeogeographical conditions (e.g. carbonate productivity and anoxic conditions) and ocean current circulation.

Trilobite

10.6084/m9.figshare.3453488

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Citations (0)

First report on the Early Devonian (Lochkovian) brachiopods from eastern Central Pamirs, Tajikistan

Journal of Asian Earth Sciences (2017)

T L Modzalevskaya Leonid E. Popov Mansoureh Ghobadi Pour Mikhail S. Dufour

Devonian

10.1016/j.jseaes.2017.02.030

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Citations (1)

Stratigraphic and volcanic signatures of Miaolingian-Late Ordovician rift pulses in the Alborz Mountains, northern Iran