Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus

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 localit...

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Detalles Bibliográficos
Publicado: 1999
Materias:
Ammonites
Argentina
Biostratigraphy
Lower Cretaceous
Neuquen Basin
Olcostephanidae
Upper Valanginian
ammonite
biostratigraphy
Cretaceous
new genus
Ammonoidea
Cephalopoda
Viluceras
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v20_n3_p343_AguirreUrreta
http://hdl.handle.net/20.500.12110/paper_01956671_v20_n3_p343_AguirreUrreta
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_01956671_v20_n3_p343_AguirreUrreta
record_format dspace
spelling paper:paper_01956671_v20_n3_p343_AguirreUrreta2023-06-08T15:20:07Z Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus Ammonites Argentina Biostratigraphy Lower Cretaceous Neuquen Basin Olcostephanidae Upper Valanginian ammonite biostratigraphy Cretaceous new genus Argentina Neuquen Basin Ammonoidea Ammonoidea Cephalopoda Viluceras 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. 1999 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v20_n3_p343_AguirreUrreta http://hdl.handle.net/20.500.12110/paper_01956671_v20_n3_p343_AguirreUrreta
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Ammonites
Argentina
Biostratigraphy
Lower Cretaceous
Neuquen Basin
Olcostephanidae
Upper Valanginian
ammonite
biostratigraphy
Cretaceous
new genus
Argentina
Neuquen Basin
Ammonoidea
Ammonoidea
Cephalopoda
Viluceras
spellingShingle Ammonites
Argentina
Biostratigraphy
Lower Cretaceous
Neuquen Basin
Olcostephanidae
Upper Valanginian
ammonite
biostratigraphy
Cretaceous
new genus
Argentina
Neuquen Basin
Ammonoidea
Ammonoidea
Cephalopoda
Viluceras
Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus
topic_facet Ammonites
Argentina
Biostratigraphy
Lower Cretaceous
Neuquen Basin
Olcostephanidae
Upper Valanginian
ammonite
biostratigraphy
Cretaceous
new genus
Argentina
Neuquen Basin
Ammonoidea
Ammonoidea
Cephalopoda
Viluceras
description 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.
title Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus
title_short Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus
title_full Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus
title_fullStr Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus
title_full_unstemmed Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus
title_sort lower cretaceous ammonites from the neuquen basin, argentina: viluceras, a new valanginian subgenus of olcostephanus
publishDate 1999
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v20_n3_p343_AguirreUrreta
http://hdl.handle.net/20.500.12110/paper_01956671_v20_n3_p343_AguirreUrreta
_version_ 1768545325153255424

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