A brittle star bed from the Miocene of Patagonia, Argentina

Autores
Martínez, Sergio; del Río, Claudia Julia; Pérez Mazliah, Damián Eduardo
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
As a consequence of the extremely poor fossil record of brittle stars, every new discovery is important. The Miocene example studied herein involves the recently described species Ophiocrossota kollenbergorum Caviglia, Martínez & del Río recovered from the Chenque Formation of southeastern Argentina. The information used here is derived from unpublished data and a new record from two discrete, thin, monospecific patches. The main taphonomic features of the patches, namely the presence of specimens concordant with bedding planes, (with either aboral or oral side upwards), and the good preservation of the delicate discs (ca. 6 mm wide on average), and the preservation of un-oriented arms complete with fragile tips (not wider than 0.2 mm), point to a suddenly buried census assemblage. Although broken or isolated arms were found, this is attributed to the erosive environmental conditions of the abrasion platform where the studied exposure is located today. Size frequency distributions suggest that both patches were buried at different seasons. Observed densities are 77 and 143 individuals/m2, and distances between individuals are random. The arm length/disc diameter ratio indicates that Ophiocrossota kollenbergorum may have been an epifaunal surface dweller. No signs of predation (such as regenerated arms), were identified.
Fil: Martínez, Sergio. Universidad de la República; Uruguay
Fil: del Río, Claudia Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
Fil: Pérez Mazliah, Damián Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
Materia
ARGENTINA
MIOCENE
OPHIOCROSSOTA KOLLENBERGORUM
OPHIUROIDS
PALAEOECOLOGY
TAPHONOMY
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:11336/97486
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/97486
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A brittle star bed from the Miocene of Patagonia, ArgentinaMartínez, Sergiodel Río, Claudia JuliaPérez Mazliah, Damián EduardoARGENTINAMIOCENEOPHIOCROSSOTA KOLLENBERGORUMOPHIUROIDSPALAEOECOLOGYTAPHONOMYhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1As a consequence of the extremely poor fossil record of brittle stars, every new discovery is important. The Miocene example studied herein involves the recently described species Ophiocrossota kollenbergorum Caviglia, Martínez & del Río recovered from the Chenque Formation of southeastern Argentina. The information used here is derived from unpublished data and a new record from two discrete, thin, monospecific patches. The main taphonomic features of the patches, namely the presence of specimens concordant with bedding planes, (with either aboral or oral side upwards), and the good preservation of the delicate discs (ca. 6 mm wide on average), and the preservation of un-oriented arms complete with fragile tips (not wider than 0.2 mm), point to a suddenly buried census assemblage. Although broken or isolated arms were found, this is attributed to the erosive environmental conditions of the abrasion platform where the studied exposure is located today. Size frequency distributions suggest that both patches were buried at different seasons. Observed densities are 77 and 143 individuals/m2, and distances between individuals are random. The arm length/disc diameter ratio indicates that Ophiocrossota kollenbergorum may have been an epifaunal surface dweller. No signs of predation (such as regenerated arms), were identified.Fil: Martínez, Sergio. Universidad de la República; UruguayFil: del Río, Claudia Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaFil: Pérez Mazliah, Damián Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaWiley Blackwell Publishing, Inc2010-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/97486Martínez, Sergio; del Río, Claudia Julia; Pérez Mazliah, Damián Eduardo; A brittle star bed from the Miocene of Patagonia, Argentina; Wiley Blackwell Publishing, Inc; Lethaia; 43; 1; 3-2010; 1-90024-1164CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1502-3931.2009.00163.xinfo:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1502-3931.2009.00163.xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-12T09:51:43Zoai:ri.conicet.gov.ar:11336/97486instacron: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:34982025-11-12 09:51:43.376CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A brittle star bed from the Miocene of Patagonia, Argentina
title A brittle star bed from the Miocene of Patagonia, Argentina
spellingShingle A brittle star bed from the Miocene of Patagonia, Argentina
Martínez, Sergio
ARGENTINA
MIOCENE
OPHIOCROSSOTA KOLLENBERGORUM
OPHIUROIDS
PALAEOECOLOGY
TAPHONOMY
title_short A brittle star bed from the Miocene of Patagonia, Argentina
title_full A brittle star bed from the Miocene of Patagonia, Argentina
title_fullStr A brittle star bed from the Miocene of Patagonia, Argentina
title_full_unstemmed A brittle star bed from the Miocene of Patagonia, Argentina
title_sort A brittle star bed from the Miocene of Patagonia, Argentina
dc.creator.none.fl_str_mv Martínez, Sergio
del Río, Claudia Julia
Pérez Mazliah, Damián Eduardo
author Martínez, Sergio
author_facet Martínez, Sergio
del Río, Claudia Julia
Pérez Mazliah, Damián Eduardo
author_role author
author2 del Río, Claudia Julia
Pérez Mazliah, Damián Eduardo
author2_role author
author
dc.subject.none.fl_str_mv ARGENTINA
MIOCENE
OPHIOCROSSOTA KOLLENBERGORUM
OPHIUROIDS
PALAEOECOLOGY
TAPHONOMY
topic ARGENTINA
MIOCENE
OPHIOCROSSOTA KOLLENBERGORUM
OPHIUROIDS
PALAEOECOLOGY
TAPHONOMY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv As a consequence of the extremely poor fossil record of brittle stars, every new discovery is important. The Miocene example studied herein involves the recently described species Ophiocrossota kollenbergorum Caviglia, Martínez & del Río recovered from the Chenque Formation of southeastern Argentina. The information used here is derived from unpublished data and a new record from two discrete, thin, monospecific patches. The main taphonomic features of the patches, namely the presence of specimens concordant with bedding planes, (with either aboral or oral side upwards), and the good preservation of the delicate discs (ca. 6 mm wide on average), and the preservation of un-oriented arms complete with fragile tips (not wider than 0.2 mm), point to a suddenly buried census assemblage. Although broken or isolated arms were found, this is attributed to the erosive environmental conditions of the abrasion platform where the studied exposure is located today. Size frequency distributions suggest that both patches were buried at different seasons. Observed densities are 77 and 143 individuals/m2, and distances between individuals are random. The arm length/disc diameter ratio indicates that Ophiocrossota kollenbergorum may have been an epifaunal surface dweller. No signs of predation (such as regenerated arms), were identified.
Fil: Martínez, Sergio. Universidad de la República; Uruguay
Fil: del Río, Claudia Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
Fil: Pérez Mazliah, Damián Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
description As a consequence of the extremely poor fossil record of brittle stars, every new discovery is important. The Miocene example studied herein involves the recently described species Ophiocrossota kollenbergorum Caviglia, Martínez & del Río recovered from the Chenque Formation of southeastern Argentina. The information used here is derived from unpublished data and a new record from two discrete, thin, monospecific patches. The main taphonomic features of the patches, namely the presence of specimens concordant with bedding planes, (with either aboral or oral side upwards), and the good preservation of the delicate discs (ca. 6 mm wide on average), and the preservation of un-oriented arms complete with fragile tips (not wider than 0.2 mm), point to a suddenly buried census assemblage. Although broken or isolated arms were found, this is attributed to the erosive environmental conditions of the abrasion platform where the studied exposure is located today. Size frequency distributions suggest that both patches were buried at different seasons. Observed densities are 77 and 143 individuals/m2, and distances between individuals are random. The arm length/disc diameter ratio indicates that Ophiocrossota kollenbergorum may have been an epifaunal surface dweller. No signs of predation (such as regenerated arms), were identified.
publishDate 2010
dc.date.none.fl_str_mv 2010-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/97486
Martínez, Sergio; del Río, Claudia Julia; Pérez Mazliah, Damián Eduardo; A brittle star bed from the Miocene of Patagonia, Argentina; Wiley Blackwell Publishing, Inc; Lethaia; 43; 1; 3-2010; 1-9
0024-1164
CONICET Digital
CONICET
url http://hdl.handle.net/11336/97486
identifier_str_mv Martínez, Sergio; del Río, Claudia Julia; Pérez Mazliah, Damián Eduardo; A brittle star bed from the Miocene of Patagonia, Argentina; Wiley Blackwell Publishing, Inc; Lethaia; 43; 1; 3-2010; 1-9
0024-1164
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1502-3931.2009.00163.x
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1502-3931.2009.00163.x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.24909

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