Conodontes y Graptolitos del Tremadociano Tardío (Ordovícico) de la Sierra de Zenta, Cordillera Oriental de Jujuy, Argentina

Albanesi, Guillermo L.; Ortega, Gladys; Monaldi, Cesar Ruben; Zeballo, Fernando Javier

doi:10.5710/amgh.v48i2(295)

Cited by 28 publications

(58 citation statements)

References 38 publications

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“…At the Zenta Range, Albanesi et al . () recovered from coquinas and sandstones superbly exposed at the Abra de Santa Ana, a low diversity conodont fauna consisting of Acodus apex Albanesi and Zeballo, Drepanoistodus chucaleznensis Albanesi and Aceñolaza and Drepanoistodus costatus (Abaimova). The conodont‐bearing levels are stratigraphically below a graptolite assemblage indicative of the Araneograptus murrayi Zone, early late Tremadocian in age (Tr3).…”

Section: Age and Correlation Of The Conodont Faunasmentioning

confidence: 97%

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New conodont taxa and biozones from the Lower Ordovician of the Cordillera Oriental, NW Argentina

et al. 2016

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The upper strata of the Santa Rosita and the Acoite formations (Lower Ordovician) exposed at Chulpíos Creek in the Santa Victoria study area of the Cordillera Oriental, NW Argentina, are analysed by means of conodont biostratigraphy. Four conodont zones are analysed for the referred formations, i.e. the Acodus apex, Acodus triangularis, Gothodus vetus and Gothodus andinus zones, on the basis of a collection with ca. 2800 conodont specimens that includes new conodont taxa. Acodus apex Albanesi and Zeballo, Acodus triangularis (Ding), Acodus zeballus n. sp., Gothodus andinus (Rao et al.), Gothodus vetus n. sp., and Paltodus cf. inaequalis (Pander) are described herein. The conodont genus Zentagnathus is diagnosed including two previously known species: Zentagnathus argentinensis (Rao et al.) and Zentagnathus primitivus (Voldman et al.). The Tetragraptus akzharensis and Baltograptus cf. deflexus graptolite zones were identified as well in the ∼1800‐m‐thick stratigraphic section. The incertae sedis Phosphannulus universalis Müller et al. is discussed for the Cordillera Oriental for the first time. The lower part of the Chulpíos section that involves the contact between the Santa Rosita and the Acoite formations is not able to be dated with precision either as upper Tremadocian or lower Floian because the ranges of the index taxa recorded in that interval of the study section span the stage boundary. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Age and Correlation Of The Conodont Faunasmentioning

confidence: 97%

“…() and Maletz and Ahlberg (); NW Argentina after Albanesi et al . (, , ), Giuliano et al . (), Voldman et al .…”

Section: Geological Framework and Study Areamentioning

confidence: 99%

New conodont taxa and biozones from the Lower Ordovician of the Cordillera Oriental, NW Argentina

et al. 2016

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“…Acodus apex Albanesi and Zeballo, , a recently described species from the Incahuasi section, was recorded in younger strata of the Parcha Formation, south of the Cordillera Oriental (Albanesi et al ., ). This form is probably phylogenetically related, because it has a design similar to A. primitivus n.…”

Section: Systematic Palaeontologymentioning

confidence: 97%

New conodont species and biostratigraphy of the Santa Rosita Formation (upper Furongian–Tremadocian) in the Tilcara Range, Cordillera Oriental of Jujuy, Argentina

Zeballo

Albanesi

2012

Geological Journal

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A new conodont collection from the Alfarcito area of the Tilcara Range, Cordillera Oriental of northwestern Argentina, has been studied. The Santa Rosita Formation exposed in this area consists of the Tilcara, Casa Colorada, Pico de Halcón, Alfarcito, Rupasca and Humacha members, which have a combined total thickness of ca. 1100 m. The sequence is composed of interbedded shales and sandstones, including calcarenites and coquinas, mostly appearing in the upper parts of the units. An abundant fauna of conodonts (ca. 11 000 elements), associated with graptolites and trilobites, was recorded. The biostratigraphic analysis allows for the identification of the Cordylodus intermedius and C. lindstromi sensu lato zones at the base of the Alfarcito Member. The C. angulatus Zone spans the upper part of the latter unit, and the Paltodus deltifer Zone (Paltodus deltifer pristinus and P. deltifer deltifer subzones) is identified in the Rupasca and Humacha members. The new species Acanthodus raqueli, A. humachensis, Utahconus tortibasis, U. scandodiformis, U. purmamarcensis, Variabiloconus crassus, Kallidontus gondwanicus and Acodus primitivus are recorded from the two latter biozones and they are described herein. The genera Acanthodus and Variabiloconus are emended, and a new genus Tilcarodus is created to include T. humahuacensis (Albanesi and Aceñolaza). Copyright © 2012 John Wiley & Sons, Ltd.

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“…) and conodonts from both NW Argentina (Gondwana; Albanesi et al . ) and Baltoscandia (Baltica; Webby et al . ).…”

Section: Age Calibration Of the Lower Interval With Exceptional Presementioning

confidence: 99%

Age calibration of the Lower Ordovician Fezouata Lagerstätte, Morocco

Lefèbvre

Gutiérrez-Marco

Lehnert

et al. 2018

LET

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The Fezouata Lagerstätte, discovered in the Lower Ordovician rocks of Morocco, is a Konservat‐Lagerstätte of prime scientific importance. It provides access not only to the ‘shelly’ (skeletonized) part of its fossil assemblages, but also to non‐biomineralized to lightly sclerotized organisms and to exceptionally preserved soft tissues of a complex ecosystem, mixing elements of both the ‘Cambrian Explosion’ and the ‘Great Ordovician Biodiversification Event’ (GOBE). The Fezouata Lagerstätte occurs at different intervals in the Fezouata Shale, a formation ranging from the lower Tremadocian to the upper Floian (Lower Ordovician). In spite of recent major advances in the detailed biostratigraphy of the Fezouata Shale, there is currently no consensus on the precise age of the fossiliferous levels yielding exceptionally preserved assemblages. Consequently, all available biostratigraphical evidence based on several fossil groups is here critically reviewed and discussed. It can be concluded that exceptional preservation is restricted to a few thin, discontinuous, lens‐shaped horizons occurring in two distinct parts of the Fezouata Shale: a lower interval (260–330 m above the base of the formation) and an upper interval (570–620 m). Integrated biostratigraphical studies, essentially based on investigations of graptolites, acritarchs and conodonts, indicate that the lower interval can be correlated with the upper Tremadocian, whereas the upper interval corresponds to the middle Floian.

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Conodontes y Graptolitos del Tremadociano Tardío (Ordovícico) de la Sierra de Zenta, Cordillera Oriental de Jujuy, Argentina

Cited by 28 publications

References 38 publications

New conodont taxa and biozones from the Lower Ordovician of the Cordillera Oriental, NW Argentina

New conodont taxa and biozones from the Lower Ordovician of the Cordillera Oriental, NW Argentina

New conodont species and biostratigraphy of the Santa Rosita Formation (upper Furongian–Tremadocian) in the Tilcara Range, Cordillera Oriental of Jujuy, Argentina

Age calibration of the Lower Ordovician Fezouata Lagerstätte, Morocco

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