Silurian stratigraphy of Central Iran – an update

Hairapetian, Vachik; Pour, Mansoureh Ghobadi; Popov, Leonid E.; Männik, Peep; Miller, C. Giles

doi:10.1515/agp-2017-0014

Cited by 10 publications

(10 citation statements)

References 33 publications

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“…There is a difference in size of the labial basal extension between D. problematicus and S. mirabilis, as well as a great time difference between their occurrences, but otherwise these two taxa could be synonymised. Siberiodus was also found in the Famennian of Chariseh section, central Iran (Hairapetian & Ginter, 2009). From the same section, but from its Frasnian part, yet another probable omalodontiform, Manberodus fortis, was recovered (Hairapetian et al, 2008).…”

Section: Siberiodus and Manberodusmentioning

confidence: 93%

“…Siberiodus was also found in the Famennian of Chariseh section, central Iran (Hairapetian & Ginter, 2009). From the same section, but from its Frasnian part, yet another probable omalodontiform, Manberodus fortis, was recovered (Hairapetian et al, 2008). Its teeth are more compact than those of Siberiodus, with three thick cusps.…”

Section: Siberiodus and Manberodusmentioning

confidence: 94%

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The dentition of Omalodontiformes, the order of unusual Devonian stem-chondrichthyans

Ginter

2023

Spanish J. Palaeontol.

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The early chondrichthyan order Omalodontiformes from the late Early Devonian through to the Late Devonian is characterised by specific teeth. Unlike in most Devonian sharks, their bases are directed labially or are reduced and devoid of labial or lingual extensions. In this paper the complex history of investigation on the dermal skeleton of omalodontiforms is presented and the validity of the established taxa is revised. The dentition of an Emsian representative of this group, known from a single articulated specimen (NMBG 10127) and several isolated fin spines from Canada and previously, probably incorrectly, attributed to Doliodus, is distinctly heterodont. The nature of this heterodonty suggests that the two omalodontiform tooth-based genera described originally from the Middle-Upper Devonian Aztec Siltstone (Antarctica), viz. Portalodus and Anareodus, are in fact congeneric as their teeth represent different parts of the same jaw. Because the teeth of the Canadian specimen differ in important aspects from those of typical Doliodus and are generally similar to those of Portalodus, it probably should be placed in a new genus. Also, the validity of the distinction between Portalodus bradshawae and P. mannoliniae is considered questionable.Resumen: El orden de los condrictios primitivos de los Omalodontiformes, Devónico Inferior tardío a Devónico Superior, se caracteriza por su específica morfología dental. A diferencia de la mayoría de tiburones devónicos, sus bases se desarrollan labialmente, o por el contrario, son bases muy reducidas que carecen de proyecciones labiales o linguales. En este artículo, se presenta la compleja historia de la investigación sobre el esqueleto dérmico de los Omalodontiformes y se revisa la validez de los taxones establecidos. La dentición de un representante emsiense de este grupo, conocido por un único espécimen articulado (NMBG 10127) y varias espinas de aletas aisladas de Canadá, fue atribuido probablemente de forma incorrecta a Doliodus. Pero esta dentición es claramente heterodonta, lo que sugiere que los dos géneros basados en dientes omalodontiformes descritos originalmente en el Devónico Medio-Superior en Aztec Siltstone (Antártida), Portalodus y Anareodus, son de hecho sinónimos, ya que sus dientes representan diferentes partes de la misma mandíbula. Dado que los dientes del espécimen canadiense difieren en aspectos importantes de los típicos de Doliodus y son, en general, similares a los de Portalodus, probablemente deberían incluirse en un nuevo género. Asimismo, se cuestiona la validez de la distinción entre Portalodus bradshawae y P. mannoliniae.

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Section: Siberiodus and Manberodusmentioning

confidence: 93%

Section: Siberiodus and Manberodusmentioning

confidence: 94%

The dentition of Omalodontiformes, the order of unusual Devonian stem-chondrichthyans

Ginter

2023

Spanish J. Palaeontol.

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“…The term "Padeha Formation", usually reported for the lowermost part of the Devonian in the eastern Alborz Mountains, seems inappropriate. The later unit was originally proposed by Ruttner et al (1968) for some nonmarine, siliciclastic-dominant deposits rich in gypsum interbeds exposed in the Ozbakh-Kuh area, northeastern Central Iran, at the base of a Devonian succession sandwiched between the Silurian marine carbonates presently assigned to the Dahaneh-Kalut Formation (Hairapetian et al, 2017) and the Givetian (Middle Devonian) Bahram Formation (Wendt et al, 2005). In the absence of fossils, the age constraints for the unit are very poor, while the detailed description of the type section is not yet available.…”

Section: Miaolingian To Ordovician Unconformitiesmentioning

confidence: 97%

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

Álvaro

Pour

Sánchez-García

et al. 2022

Journal of Asian Earth Sciences

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“…The upper member, of Late Ordovician age, consists of a lower red bed interval that grades upward into mixed marine and non-marine sediments (Hamedi 1995). In the Kerman region, the Katkoyeh Formation disconformably overlies the Furongian stromatolitic Hatkan Dolomite Member of the topmost Kuh-Banan Formation, and is overlain in turn by the basal fluvial deposits of the Silurian Shabdjereh Formation (Hamedi 1995, Zhen et al 2001, Hairapetian et al 2017.…”

Section: Geological Settingmentioning

confidence: 99%

“…In a landmark conodont contribution, Müller (1973) analyzed Cambrian-Early Ordovician conodonts from Northern Iran (Alborz region). However, conodonts from the Katkoyeh Formation in the central regions of Iran went out of research focus until publications by Hamedi (1995), Hamedi et al (1997), Zhen et al (2001) and Hairapetian et al (2017). Apart from a few conodont publications from the Shirgesht Formation in the Tabas area (Ghaderi et al 2008(Ghaderi et al , 2009, the application of conodonts to the lower Palaeozoic biostratigraphy in Central Iran has been limited.…”

mentioning

confidence: 99%

New data on conodonts and ostracods of the Katkoyeh Formation (Lower-Upper Ordovician) at the Banestan Section of East-Central Iran: biostratigraphical and palaeobiogeographical significance

Poursalehi¹,

Voldman²,

Bahrami³

et al. 2022

Bull. Geosci.

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Iran was a persistent single tectonic unit throughout the Ordovician, located somewhere on the northern margin of Gondwana (Cocks & Torsvik 2021). Its precise rifting time from mainland Gondwana is still not defined, but the very low diversity of Ordovician brachiopod faunas in the region by comparison with contemporaneous Mediterranean Province fauna of Morocco and Bohemia suggests that Iran was situated in a high latitude location throughout the Ordovician Period (Basset et al. 1999).Ordovician marine sedimentary sequences occur in a number of widely separated structural units of Iran.Mostly but not exclusively, they crop out in the Zagros area (Southwest Iran), and in the well-known outcrops of the Alborz Range (North Iran), Tabas and Kerman regions (East-Central Iran) (Fig. 1A). Parts of the sequences contain rich fossil faunas, such as conodonts, trilobites or brachiopods, but with a small number of notable exceptions there are few studies on taxonomy, biostratigraphy and biogeography of these biotas (e.g.

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Silurian stratigraphy of Central Iran – an update

Abstract: ABSTRACT:Hairapetian,

Cited by 10 publications

References 33 publications

The dentition of Omalodontiformes, the order of unusual Devonian stem-chondrichthyans

The dentition of Omalodontiformes, the order of unusual Devonian stem-chondrichthyans

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

New data on conodonts and ostracods of the Katkoyeh Formation (Lower-Upper Ordovician) at the Banestan Section of East-Central Iran: biostratigraphical and palaeobiogeographical significance

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