A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin

Autores
Disaró, Sibelle Trevisan; Watanabe, Silvia; Totah, Violeta Ines
Año de publicación
2023
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Studying living benthic foraminifers from the northeastern Braziliancontinental margin for several years, we have recorded around 1,100 specieswith a tremendous foraminiferal richness. Many researchers were active in thelast century on the Tropical Southwest Atlantic. The possibility of beinginvolved in this research brings us a new understanding of the regionalforaminiferal biodiversity and promotes the discovery of a new speciespresenting now. Searching publications for similar species we had no success.Another difficulty was placing this new form in an adequate genus due tocertaindistinctive features; therefore, we probably have a new genus, too; fornow, we will call it Discorbinella (?) sp. nov.The test wasfrequently attached to bioclasts or lithoclasts but also free; it presents alow trochospiral arrangement, subcircular to oval outline, slightly lobed witha rounded periphery. It has a calcareous wall semi-transparent with milky whitecolor. The dorsal side is convex with 2.5 to 3 whorls, partially evolute. The suturesare gently curved and slightly depressed with a peculiar chamber overlappingdue to how the proximal portion of the subsequent chambers lays over the distalportion of the anterior one. It has 6 to 8 falciform to subrectangular chambersper whorl, increasing in size as added. Another notable characteristic is thelarge pores distributed over most of the spiral side, not uniform in size butalmost uniformly distributed, following the sutural direction on the dorsalside, giving a coarse appearance to the test. The umbilical side is involuteand slightly concave; sutures are sinuous, visible but obscured by theextensive development of papillae almost even in size, though they cover mostof the umbilical face except for the periphery, which shows a smooth stripewith pores, little ones. Umbilicus is covered by papillae from the chambers ofthe previous coil. The aperture is a small, simple opening on the periphery atthe base of the last chamber, another one on the umbilical side, under the wideflap projected towards the umbilicus. The height (mean ± SD) is 50.46 μm ±16.36, and the diameter is 166.20 μm ± 47.40. They live between 4 and 49 metersdeep. Considering the narrow continental shelf, they are found from the innerto the outer shelf on variable sediments: lithobioclastics, lithoclastics,biolithoclastics, and bioclastics.
Fil: Disaró, Sibelle Trevisan. Universidade Federal do Paraná; Brasil
Fil: Watanabe, Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Totah, Violeta Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
International Symposium on Foraminifera
Perugia
Italia
Grzybowski Foundation
Materia
GLOBOTHALAMEA (RHIZARIA, FORAMINIFERA)
NEW SPECIES
NORTHEASTERN BRAZIL
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:11336/269163

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network_name_str CONICET Digital (CONICET)
spelling A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental marginDisaró, Sibelle TrevisanWatanabe, SilviaTotah, Violeta InesGLOBOTHALAMEA (RHIZARIA, FORAMINIFERA)NEW SPECIESNORTHEASTERN BRAZILhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Studying living benthic foraminifers from the northeastern Braziliancontinental margin for several years, we have recorded around 1,100 specieswith a tremendous foraminiferal richness. Many researchers were active in thelast century on the Tropical Southwest Atlantic. The possibility of beinginvolved in this research brings us a new understanding of the regionalforaminiferal biodiversity and promotes the discovery of a new speciespresenting now. Searching publications for similar species we had no success.Another difficulty was placing this new form in an adequate genus due tocertaindistinctive features; therefore, we probably have a new genus, too; fornow, we will call it Discorbinella (?) sp. nov.The test wasfrequently attached to bioclasts or lithoclasts but also free; it presents alow trochospiral arrangement, subcircular to oval outline, slightly lobed witha rounded periphery. It has a calcareous wall semi-transparent with milky whitecolor. The dorsal side is convex with 2.5 to 3 whorls, partially evolute. The suturesare gently curved and slightly depressed with a peculiar chamber overlappingdue to how the proximal portion of the subsequent chambers lays over the distalportion of the anterior one. It has 6 to 8 falciform to subrectangular chambersper whorl, increasing in size as added. Another notable characteristic is thelarge pores distributed over most of the spiral side, not uniform in size butalmost uniformly distributed, following the sutural direction on the dorsalside, giving a coarse appearance to the test. The umbilical side is involuteand slightly concave; sutures are sinuous, visible but obscured by theextensive development of papillae almost even in size, though they cover mostof the umbilical face except for the periphery, which shows a smooth stripewith pores, little ones. Umbilicus is covered by papillae from the chambers ofthe previous coil. The aperture is a small, simple opening on the periphery atthe base of the last chamber, another one on the umbilical side, under the wideflap projected towards the umbilicus. The height (mean ± SD) is 50.46 μm ±16.36, and the diameter is 166.20 μm ± 47.40. They live between 4 and 49 metersdeep. Considering the narrow continental shelf, they are found from the innerto the outer shelf on variable sediments: lithobioclastics, lithoclastics,biolithoclastics, and bioclastics.Fil: Disaró, Sibelle Trevisan. Universidade Federal do Paraná; BrasilFil: Watanabe, Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Totah, Violeta Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaInternational Symposium on ForaminiferaPerugiaItaliaGrzybowski FoundationGrzybowski FoundationPapazzoni, Cesare AndreaPetrizzo, Maria Rose2023info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectSimposioBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/vnd.openxmlformats-officedocument.wordprocessingml.documentapplication/pdfhttp://hdl.handle.net/11336/269163A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin; International Symposium on Foraminifera; Perugia; Italia; 2023; 96-96978-83-941956-6-3CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://distav.unige.it/forams2022/sites/default/files/docs/GFSP27-Forams%202023-Abstracts-2.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:17:56Zoai:ri.conicet.gov.ar:11336/269163instacron: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:34982025-09-29 10:17:57.168CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin
title A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin
spellingShingle A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin
Disaró, Sibelle Trevisan
GLOBOTHALAMEA (RHIZARIA, FORAMINIFERA)
NEW SPECIES
NORTHEASTERN BRAZIL
title_short A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin
title_full A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin
title_fullStr A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin
title_full_unstemmed A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin
title_sort A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin
dc.creator.none.fl_str_mv Disaró, Sibelle Trevisan
Watanabe, Silvia
Totah, Violeta Ines
author Disaró, Sibelle Trevisan
author_facet Disaró, Sibelle Trevisan
Watanabe, Silvia
Totah, Violeta Ines
author_role author
author2 Watanabe, Silvia
Totah, Violeta Ines
author2_role author
author
dc.contributor.none.fl_str_mv Papazzoni, Cesare Andrea
Petrizzo, Maria Rose
dc.subject.none.fl_str_mv GLOBOTHALAMEA (RHIZARIA, FORAMINIFERA)
NEW SPECIES
NORTHEASTERN BRAZIL
topic GLOBOTHALAMEA (RHIZARIA, FORAMINIFERA)
NEW SPECIES
NORTHEASTERN BRAZIL
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Studying living benthic foraminifers from the northeastern Braziliancontinental margin for several years, we have recorded around 1,100 specieswith a tremendous foraminiferal richness. Many researchers were active in thelast century on the Tropical Southwest Atlantic. The possibility of beinginvolved in this research brings us a new understanding of the regionalforaminiferal biodiversity and promotes the discovery of a new speciespresenting now. Searching publications for similar species we had no success.Another difficulty was placing this new form in an adequate genus due tocertaindistinctive features; therefore, we probably have a new genus, too; fornow, we will call it Discorbinella (?) sp. nov.The test wasfrequently attached to bioclasts or lithoclasts but also free; it presents alow trochospiral arrangement, subcircular to oval outline, slightly lobed witha rounded periphery. It has a calcareous wall semi-transparent with milky whitecolor. The dorsal side is convex with 2.5 to 3 whorls, partially evolute. The suturesare gently curved and slightly depressed with a peculiar chamber overlappingdue to how the proximal portion of the subsequent chambers lays over the distalportion of the anterior one. It has 6 to 8 falciform to subrectangular chambersper whorl, increasing in size as added. Another notable characteristic is thelarge pores distributed over most of the spiral side, not uniform in size butalmost uniformly distributed, following the sutural direction on the dorsalside, giving a coarse appearance to the test. The umbilical side is involuteand slightly concave; sutures are sinuous, visible but obscured by theextensive development of papillae almost even in size, though they cover mostof the umbilical face except for the periphery, which shows a smooth stripewith pores, little ones. Umbilicus is covered by papillae from the chambers ofthe previous coil. The aperture is a small, simple opening on the periphery atthe base of the last chamber, another one on the umbilical side, under the wideflap projected towards the umbilicus. The height (mean ± SD) is 50.46 μm ±16.36, and the diameter is 166.20 μm ± 47.40. They live between 4 and 49 metersdeep. Considering the narrow continental shelf, they are found from the innerto the outer shelf on variable sediments: lithobioclastics, lithoclastics,biolithoclastics, and bioclastics.
Fil: Disaró, Sibelle Trevisan. Universidade Federal do Paraná; Brasil
Fil: Watanabe, Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Totah, Violeta Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
International Symposium on Foraminifera
Perugia
Italia
Grzybowski Foundation
description Studying living benthic foraminifers from the northeastern Braziliancontinental margin for several years, we have recorded around 1,100 specieswith a tremendous foraminiferal richness. Many researchers were active in thelast century on the Tropical Southwest Atlantic. The possibility of beinginvolved in this research brings us a new understanding of the regionalforaminiferal biodiversity and promotes the discovery of a new speciespresenting now. Searching publications for similar species we had no success.Another difficulty was placing this new form in an adequate genus due tocertaindistinctive features; therefore, we probably have a new genus, too; fornow, we will call it Discorbinella (?) sp. nov.The test wasfrequently attached to bioclasts or lithoclasts but also free; it presents alow trochospiral arrangement, subcircular to oval outline, slightly lobed witha rounded periphery. It has a calcareous wall semi-transparent with milky whitecolor. The dorsal side is convex with 2.5 to 3 whorls, partially evolute. The suturesare gently curved and slightly depressed with a peculiar chamber overlappingdue to how the proximal portion of the subsequent chambers lays over the distalportion of the anterior one. It has 6 to 8 falciform to subrectangular chambersper whorl, increasing in size as added. Another notable characteristic is thelarge pores distributed over most of the spiral side, not uniform in size butalmost uniformly distributed, following the sutural direction on the dorsalside, giving a coarse appearance to the test. The umbilical side is involuteand slightly concave; sutures are sinuous, visible but obscured by theextensive development of papillae almost even in size, though they cover mostof the umbilical face except for the periphery, which shows a smooth stripewith pores, little ones. Umbilicus is covered by papillae from the chambers ofthe previous coil. The aperture is a small, simple opening on the periphery atthe base of the last chamber, another one on the umbilical side, under the wideflap projected towards the umbilicus. The height (mean ± SD) is 50.46 μm ±16.36, and the diameter is 166.20 μm ± 47.40. They live between 4 and 49 metersdeep. Considering the narrow continental shelf, they are found from the innerto the outer shelf on variable sediments: lithobioclastics, lithoclastics,biolithoclastics, and bioclastics.
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Simposio
Book
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/11336/269163
A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin; International Symposium on Foraminifera; Perugia; Italia; 2023; 96-96
978-83-941956-6-3
CONICET Digital
CONICET
url http://hdl.handle.net/11336/269163
identifier_str_mv A new calcareous Globothalamea (Rhizaria, Foraminifera) from the northeastern Brazilian continental margin; International Symposium on Foraminifera; Perugia; Italia; 2023; 96-96
978-83-941956-6-3
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://distav.unige.it/forams2022/sites/default/files/docs/GFSP27-Forams%202023-Abstracts-2.pdf
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/vnd.openxmlformats-officedocument.wordprocessingml.document
application/pdf
dc.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Grzybowski Foundation
publisher.none.fl_str_mv Grzybowski Foundation
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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