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Abstract:

Viluceras is proposed as a new subgenus of Olcostephanus to accommodate a distinctive Argentinian Lower Cretaceous (Upper Valanginian) ammonite fauna originally assigned to the boreal genus Simbirskites and subsequently placed in Lemurostephanus. Based on extensive new collections from eight localities in the Neuquen Basin, three Viluceras species are described, including O. (Viluceras) duraznoensis sp. nov. With them occur rare O. (Olcostephanus) mingrammi (Leanza). The fauna characterises the Olcostephanus (Viluceras) permolestus Subzone, which may correlate approximately with the Himantoceras trinodosum Zone of the West Mediterranean Province.

Registro:

Documento: Artículo
Título:Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus
Autor:Aguirre-Urreta, M.B.; Rawson, P.F.
Filiación:Depto. 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
Palabras clave:Ammonites; Argentina; Biostratigraphy; Lower Cretaceous; Neuquen Basin; Olcostephanidae; Upper Valanginian; ammonite; biostratigraphy; Cretaceous; new genus; Argentina; Neuquen Basin; Ammonoidea; Ammonoidea; Cephalopoda; Viluceras
Año:1999
Volumen:20
Número:3
Página de inicio:343
Página de fin:357
DOI: http://dx.doi.org/10.1006/cres.1999.0154
Título revista:Cretaceous Research
Título revista abreviado:Cretaceous Res.
ISSN:01956671
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v20_n3_p343_AguirreUrreta

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Citas:

---------- APA ----------
Aguirre-Urreta, M.B. & Rawson, P.F. (1999) . Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus. Cretaceous Research, 20(3), 343-357.
http://dx.doi.org/10.1006/cres.1999.0154
---------- CHICAGO ----------
Aguirre-Urreta, M.B., Rawson, P.F. "Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus" . Cretaceous Research 20, no. 3 (1999) : 343-357.
http://dx.doi.org/10.1006/cres.1999.0154
---------- MLA ----------
Aguirre-Urreta, M.B., Rawson, P.F. "Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus" . Cretaceous Research, vol. 20, no. 3, 1999, pp. 343-357.
http://dx.doi.org/10.1006/cres.1999.0154
---------- VANCOUVER ----------
Aguirre-Urreta, M.B., Rawson, P.F. Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus. Cretaceous Res. 1999;20(3):343-357.
http://dx.doi.org/10.1006/cres.1999.0154