Abstract:
The olcostephanid fauna of the Olcostephanus (O.) laticosta [formerly O. (O.) leanzai] Subzone (Agrio Formation) represents the last of four discrete invasions of olcostephanid ammonites into the Neuquén Basin of west-central Argentina. Olcostephanus (O.) laticosta (Gerth) dominates the fauna and is known only from the Neuquén Basin. But the co-occurrence of the distinctive subgenus Feannoticeras, newly recorded from Argentina, provides a link with the 'standard' West Mediterranean sequence and indicates that the O. (O.) laticosta Subzone is probably of mid Early Hauterivian age. This is supported by the discovery of two specimens of the widely distributed late Early Hauterivian species O. (O.) variegatus (Paquier) in the overlying Hoplitocrioceras giovinei Subzone. O. (Jeannoticeras) agrioensis sp. nov. is described.
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Documento: |
Artículo
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Título: | Lower Cretaceous ammonites from the Neuquén Basin, Argentina: A Hauterivian Olcostephanus fauna |
Autor: | Aguirre-Urreta, M.B.; Rawson, P.F. |
Filiación: | Departamento De Ciencias Geológicas, Universidad De Buenos Aires, Ciudad Universitaria, 1428, Buenos Aires, Argentina Department of Geological Sciences, University College London, Gower Street, London, WC1E 6BT, United Kingdom
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Palabras clave: | Ammonites; Argentina; Biostratigraphy; Lower cretaceous; Lower Hauterivian; Neuquén basin; Olcostephanidae; ammonite; biostratigraphy; Cretaceous; Hauterivian; lithostratigraphy; morphology; Argentina; Neuquen Basin; Ammonoidea; Ammonoidea; Hoplitocrioceras giovinei; Invertebrata; Jeannoticeras; Olcostephanidae; Olcostephanus laticosta; Olcostephanus variegatus |
Año: | 2001
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Volumen: | 22
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Número: | 6
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Página de inicio: | 763
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Página de fin: | 778
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DOI: |
http://dx.doi.org/10.1006/cres.2001.0289 |
Título revista: | Cretaceous Research
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Título revista abreviado: | Cretaceous Res.
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ISSN: | 01956671
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v22_n6_p763_AguirreUrreta |
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Citas:
---------- APA ----------
Aguirre-Urreta, M.B. & Rawson, P.F.
(2001)
. Lower Cretaceous ammonites from the Neuquén Basin, Argentina: A Hauterivian Olcostephanus fauna. Cretaceous Research, 22(6), 763-778.
http://dx.doi.org/10.1006/cres.2001.0289---------- CHICAGO ----------
Aguirre-Urreta, M.B., Rawson, P.F.
"Lower Cretaceous ammonites from the Neuquén Basin, Argentina: A Hauterivian Olcostephanus fauna"
. Cretaceous Research 22, no. 6
(2001) : 763-778.
http://dx.doi.org/10.1006/cres.2001.0289---------- MLA ----------
Aguirre-Urreta, M.B., Rawson, P.F.
"Lower Cretaceous ammonites from the Neuquén Basin, Argentina: A Hauterivian Olcostephanus fauna"
. Cretaceous Research, vol. 22, no. 6, 2001, pp. 763-778.
http://dx.doi.org/10.1006/cres.2001.0289---------- VANCOUVER ----------
Aguirre-Urreta, M.B., Rawson, P.F. Lower Cretaceous ammonites from the Neuquén Basin, Argentina: A Hauterivian Olcostephanus fauna. Cretaceous Res. 2001;22(6):763-778.
http://dx.doi.org/10.1006/cres.2001.0289