First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay

Autores
Cichowolski, Marcela; Uriz, Norberto Javier; Alfaro, Marta Beatriz; Galeano Inchausti, J. C.
Año de publicación
2016
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
The ascocerid cephalopods were restrictively recognized in Ordovician andSilurian strata of North America (Canada, USA) and Europe (Bohemia, Estonia,Norway, Poland, Sweden, United Kingdom), being unknown from Gondwana. This workconstitutes the first mention of the Order Ascocerida Kuhn, 1949, from thesouthern hemisphere. Our material comes from the Itacurubí Groupof the Paraná Basin (southeastern Paraguay). At least two specimens were collectedat the Santa Elena quarry, from the Eusebio Ayala Formation (Hirnantian-Llandovery).Although poorly preserved, both specimens show an initial longiconic andslightly cyrtoconic phragmocone that abruptly increases its apical angle,turning wider at a certain point, although apparently with straight sutures.Adorad, the incomplete living chamber seems to be depressed in cross section.The lack of recognition of ascoceroid sutures indicates either a poor preservation,or the presence of primitive forms within the group, possibly close to theFamily Hebetoceratidae Flower, 1940. It is worth noting the preservation ofboth parts of the conch before the truncation, which is extremely rare. Thesefindings indicate a different paleogeographical dispersion of these forms thanpreviously assumed. More studies are needed to improve our understanding about themorphology of these specimens in order to clarify the dispersal of theseoccurrences to the southwestern Gondwana.
Fil: Cichowolski, Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Uriz, Norberto Javier. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina
Fil: Alfaro, Marta Beatriz. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina
Fil: Galeano Inchausti, J. C.. Ministerio de Obras Públicas y Comunicaciones de Paraguay; Paraguay
11º Congreso de la Asociación Paleontológica Argentina
Argentina
Asociación Paleontológica Argentina
Materia
ASCOCERIDA
PARAGUAY
HIRNANTIANO
PARANA BASIN
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/241922
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, ParaguayCichowolski, MarcelaUriz, Norberto JavierAlfaro, Marta BeatrizGaleano Inchausti, J. C.ASCOCERIDAPARAGUAYHIRNANTIANOPARANA BASINhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The ascocerid cephalopods were restrictively recognized in Ordovician andSilurian strata of North America (Canada, USA) and Europe (Bohemia, Estonia,Norway, Poland, Sweden, United Kingdom), being unknown from Gondwana. This workconstitutes the first mention of the Order Ascocerida Kuhn, 1949, from thesouthern hemisphere. Our material comes from the Itacurubí Groupof the Paraná Basin (southeastern Paraguay). At least two specimens were collectedat the Santa Elena quarry, from the Eusebio Ayala Formation (Hirnantian-Llandovery).Although poorly preserved, both specimens show an initial longiconic andslightly cyrtoconic phragmocone that abruptly increases its apical angle,turning wider at a certain point, although apparently with straight sutures.Adorad, the incomplete living chamber seems to be depressed in cross section.The lack of recognition of ascoceroid sutures indicates either a poor preservation,or the presence of primitive forms within the group, possibly close to theFamily Hebetoceratidae Flower, 1940. It is worth noting the preservation ofboth parts of the conch before the truncation, which is extremely rare. Thesefindings indicate a different paleogeographical dispersion of these forms thanpreviously assumed. More studies are needed to improve our understanding about themorphology of these specimens in order to clarify the dispersal of theseoccurrences to the southwestern Gondwana.Fil: Cichowolski, Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Uriz, Norberto Javier. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; ArgentinaFil: Alfaro, Marta Beatriz. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; ArgentinaFil: Galeano Inchausti, J. C.. Ministerio de Obras Públicas y Comunicaciones de Paraguay; Paraguay11º Congreso de la Asociación Paleontológica ArgentinaArgentinaAsociación Paleontológica ArgentinaAsociación Paleontológica Argentina2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/241922First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay; 11º Congreso de la Asociación Paleontológica Argentina; Argentina; 2016; 1-2CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.apaleontologica.org.ar/wp-content/uploads/2022/02/XI-CAPA-Libro-de-Resu%CC%81menes-2016.pdfNacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:46:59Zoai:ri.conicet.gov.ar:11336/241922instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:46:59.275CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay
title First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay
spellingShingle First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay
Cichowolski, Marcela
ASCOCERIDA
PARAGUAY
HIRNANTIANO
PARANA BASIN
title_short First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay
title_full First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay
title_fullStr First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay
title_full_unstemmed First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay
title_sort First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay
dc.creator.none.fl_str_mv Cichowolski, Marcela
Uriz, Norberto Javier
Alfaro, Marta Beatriz
Galeano Inchausti, J. C.
author Cichowolski, Marcela
author_facet Cichowolski, Marcela
Uriz, Norberto Javier
Alfaro, Marta Beatriz
Galeano Inchausti, J. C.
author_role author
author2 Uriz, Norberto Javier
Alfaro, Marta Beatriz
Galeano Inchausti, J. C.
author2_role author
author
author
dc.subject.none.fl_str_mv ASCOCERIDA
PARAGUAY
HIRNANTIANO
PARANA BASIN
topic ASCOCERIDA
PARAGUAY
HIRNANTIANO
PARANA BASIN
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The ascocerid cephalopods were restrictively recognized in Ordovician andSilurian strata of North America (Canada, USA) and Europe (Bohemia, Estonia,Norway, Poland, Sweden, United Kingdom), being unknown from Gondwana. This workconstitutes the first mention of the Order Ascocerida Kuhn, 1949, from thesouthern hemisphere. Our material comes from the Itacurubí Groupof the Paraná Basin (southeastern Paraguay). At least two specimens were collectedat the Santa Elena quarry, from the Eusebio Ayala Formation (Hirnantian-Llandovery).Although poorly preserved, both specimens show an initial longiconic andslightly cyrtoconic phragmocone that abruptly increases its apical angle,turning wider at a certain point, although apparently with straight sutures.Adorad, the incomplete living chamber seems to be depressed in cross section.The lack of recognition of ascoceroid sutures indicates either a poor preservation,or the presence of primitive forms within the group, possibly close to theFamily Hebetoceratidae Flower, 1940. It is worth noting the preservation ofboth parts of the conch before the truncation, which is extremely rare. Thesefindings indicate a different paleogeographical dispersion of these forms thanpreviously assumed. More studies are needed to improve our understanding about themorphology of these specimens in order to clarify the dispersal of theseoccurrences to the southwestern Gondwana.
Fil: Cichowolski, Marcela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
Fil: Uriz, Norberto Javier. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina
Fil: Alfaro, Marta Beatriz. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina
Fil: Galeano Inchausti, J. C.. Ministerio de Obras Públicas y Comunicaciones de Paraguay; Paraguay
11º Congreso de la Asociación Paleontológica Argentina
Argentina
Asociación Paleontológica Argentina
description The ascocerid cephalopods were restrictively recognized in Ordovician andSilurian strata of North America (Canada, USA) and Europe (Bohemia, Estonia,Norway, Poland, Sweden, United Kingdom), being unknown from Gondwana. This workconstitutes the first mention of the Order Ascocerida Kuhn, 1949, from thesouthern hemisphere. Our material comes from the Itacurubí Groupof the Paraná Basin (southeastern Paraguay). At least two specimens were collectedat the Santa Elena quarry, from the Eusebio Ayala Formation (Hirnantian-Llandovery).Although poorly preserved, both specimens show an initial longiconic andslightly cyrtoconic phragmocone that abruptly increases its apical angle,turning wider at a certain point, although apparently with straight sutures.Adorad, the incomplete living chamber seems to be depressed in cross section.The lack of recognition of ascoceroid sutures indicates either a poor preservation,or the presence of primitive forms within the group, possibly close to theFamily Hebetoceratidae Flower, 1940. It is worth noting the preservation ofboth parts of the conch before the truncation, which is extremely rare. Thesefindings indicate a different paleogeographical dispersion of these forms thanpreviously assumed. More studies are needed to improve our understanding about themorphology of these specimens in order to clarify the dispersal of theseoccurrences to the southwestern Gondwana.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
Journal
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/241922
First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay; 11º Congreso de la Asociación Paleontológica Argentina; Argentina; 2016; 1-2
CONICET Digital
CONICET
url http://hdl.handle.net/11336/241922
identifier_str_mv First report of the cephalopod Order Ascocerida in the southern Hemisphere, Hirnantian of the Paraná Basin, Paraguay; 11º Congreso de la Asociación Paleontológica Argentina; Argentina; 2016; 1-2
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.apaleontologica.org.ar/wp-content/uploads/2022/02/XI-CAPA-Libro-de-Resu%CC%81menes-2016.pdf
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dc.coverage.none.fl_str_mv Nacional
dc.publisher.none.fl_str_mv Asociación Paleontológica Argentina
publisher.none.fl_str_mv Asociación Paleontológica Argentina
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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