Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina)

Autores
Milla Carmona, Pablo Sebastián; Lazo, Dario Gustavo; Soto, Ignacio Maria
Año de publicación
2019
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Because of the outstanding diversity and disparity they reached during the Mesozoic, the paleobiology of trigoniid bivalves has attracted considerable interest. In this work, we assess the patterns of allometric variation within the genus Steinmanella (Myophorellinae, Trigonioida) as it occurs in the lower Valanginian - upper Hauterivian (Lower Cretaceous) of the Neuquén Basin (west-central Argentina). A sample of 236 specimens belonging to 7 species of Steinmanella (namely, S. quintucoensis, S. subquadrata, S. curacoensis, S. caicayensis, S. pehuenmapuensis, S. transitoria and S. vacaensis), was digitized in three dimensions, and variation in two prominent external morphological characters, general geometry and sculpture, was subsequently analyzed. Shell surface shape and size were measured by means of 3D geometric morphometrics, whereas sculpture was quantified using counts of ribs and nodes. The trajectories of the studied species through different size categories (intended to represent meaningful ontogenetic stages) were compared using phenotypic trajectory analysis. Our results show that early and late growth changes differ in style across species. The former seems to be far more plastic, being characterized by changes in the direction and magnitude of the allometric trajectory in the shell surface and sculpture morphospaces, respectively. On the other hand, late growth seems to be more conserved and channelled, showing more infrequent changes which mainly involve the magnitude of the trajectory across the surface morphospace. Therefore, the distinctive features of each species would had been acquired early in life, with later changes involving a general trend towards elongation of the shell, thus challenging the view that early development is more conserved in evolution. These findings can have important implications for the evolution of Steinmanella, as heterochronic processes acting upon ontogenetic variation is thought to be a major driver of bivalve evolution.
Fil: Milla Carmona, Pablo Sebastián. 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: Lazo, Dario Gustavo. 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: Soto, Ignacio Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina
11th North American Paleontological Convention
Riverside
Estados Unidos
Paleontological Society
Materia
Steinmanella
Allometric variation
Geometric morphometrics
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:11336/159306
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina)Milla Carmona, Pablo SebastiánLazo, Dario GustavoSoto, Ignacio MariaSteinmanellaAllometric variationGeometric morphometricshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Because of the outstanding diversity and disparity they reached during the Mesozoic, the paleobiology of trigoniid bivalves has attracted considerable interest. In this work, we assess the patterns of allometric variation within the genus Steinmanella (Myophorellinae, Trigonioida) as it occurs in the lower Valanginian - upper Hauterivian (Lower Cretaceous) of the Neuquén Basin (west-central Argentina). A sample of 236 specimens belonging to 7 species of Steinmanella (namely, S. quintucoensis, S. subquadrata, S. curacoensis, S. caicayensis, S. pehuenmapuensis, S. transitoria and S. vacaensis), was digitized in three dimensions, and variation in two prominent external morphological characters, general geometry and sculpture, was subsequently analyzed. Shell surface shape and size were measured by means of 3D geometric morphometrics, whereas sculpture was quantified using counts of ribs and nodes. The trajectories of the studied species through different size categories (intended to represent meaningful ontogenetic stages) were compared using phenotypic trajectory analysis. Our results show that early and late growth changes differ in style across species. The former seems to be far more plastic, being characterized by changes in the direction and magnitude of the allometric trajectory in the shell surface and sculpture morphospaces, respectively. On the other hand, late growth seems to be more conserved and channelled, showing more infrequent changes which mainly involve the magnitude of the trajectory across the surface morphospace. Therefore, the distinctive features of each species would had been acquired early in life, with later changes involving a general trend towards elongation of the shell, thus challenging the view that early development is more conserved in evolution. These findings can have important implications for the evolution of Steinmanella, as heterochronic processes acting upon ontogenetic variation is thought to be a major driver of bivalve evolution.Fil: Milla Carmona, Pablo Sebastián. 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: Lazo, Dario Gustavo. 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: Soto, Ignacio Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina11th North American Paleontological ConventionRiversideEstados UnidosPaleontological SocietyUniversity of California Museum of Paleontology2019info: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/11336/159306Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina); 11th North American Paleontological Convention; Riverside; Estados Unidos; 2019; 247-2480031-0298CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://escholarship.org/uc/item/6r18f8wnInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:11:48Zoai:ri.conicet.gov.ar:11336/159306instacron: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 10:11:48.73CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina)
title Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina)
spellingShingle Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina)
Milla Carmona, Pablo Sebastián
Steinmanella
Allometric variation
Geometric morphometrics
title_short Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina)
title_full Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina)
title_fullStr Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina)
title_full_unstemmed Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina)
title_sort Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina)
dc.creator.none.fl_str_mv Milla Carmona, Pablo Sebastián
Lazo, Dario Gustavo
Soto, Ignacio Maria
author Milla Carmona, Pablo Sebastián
author_facet Milla Carmona, Pablo Sebastián
Lazo, Dario Gustavo
Soto, Ignacio Maria
author_role author
author2 Lazo, Dario Gustavo
Soto, Ignacio Maria
author2_role author
author
dc.subject.none.fl_str_mv Steinmanella
Allometric variation
Geometric morphometrics
topic Steinmanella
Allometric variation
Geometric morphometrics
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Because of the outstanding diversity and disparity they reached during the Mesozoic, the paleobiology of trigoniid bivalves has attracted considerable interest. In this work, we assess the patterns of allometric variation within the genus Steinmanella (Myophorellinae, Trigonioida) as it occurs in the lower Valanginian - upper Hauterivian (Lower Cretaceous) of the Neuquén Basin (west-central Argentina). A sample of 236 specimens belonging to 7 species of Steinmanella (namely, S. quintucoensis, S. subquadrata, S. curacoensis, S. caicayensis, S. pehuenmapuensis, S. transitoria and S. vacaensis), was digitized in three dimensions, and variation in two prominent external morphological characters, general geometry and sculpture, was subsequently analyzed. Shell surface shape and size were measured by means of 3D geometric morphometrics, whereas sculpture was quantified using counts of ribs and nodes. The trajectories of the studied species through different size categories (intended to represent meaningful ontogenetic stages) were compared using phenotypic trajectory analysis. Our results show that early and late growth changes differ in style across species. The former seems to be far more plastic, being characterized by changes in the direction and magnitude of the allometric trajectory in the shell surface and sculpture morphospaces, respectively. On the other hand, late growth seems to be more conserved and channelled, showing more infrequent changes which mainly involve the magnitude of the trajectory across the surface morphospace. Therefore, the distinctive features of each species would had been acquired early in life, with later changes involving a general trend towards elongation of the shell, thus challenging the view that early development is more conserved in evolution. These findings can have important implications for the evolution of Steinmanella, as heterochronic processes acting upon ontogenetic variation is thought to be a major driver of bivalve evolution.
Fil: Milla Carmona, Pablo Sebastián. 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: Lazo, Dario Gustavo. 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: Soto, Ignacio Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Ecología, Genética y Evolución de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Ecología, Genética y Evolución de Buenos Aires; Argentina
11th North American Paleontological Convention
Riverside
Estados Unidos
Paleontological Society
description Because of the outstanding diversity and disparity they reached during the Mesozoic, the paleobiology of trigoniid bivalves has attracted considerable interest. In this work, we assess the patterns of allometric variation within the genus Steinmanella (Myophorellinae, Trigonioida) as it occurs in the lower Valanginian - upper Hauterivian (Lower Cretaceous) of the Neuquén Basin (west-central Argentina). A sample of 236 specimens belonging to 7 species of Steinmanella (namely, S. quintucoensis, S. subquadrata, S. curacoensis, S. caicayensis, S. pehuenmapuensis, S. transitoria and S. vacaensis), was digitized in three dimensions, and variation in two prominent external morphological characters, general geometry and sculpture, was subsequently analyzed. Shell surface shape and size were measured by means of 3D geometric morphometrics, whereas sculpture was quantified using counts of ribs and nodes. The trajectories of the studied species through different size categories (intended to represent meaningful ontogenetic stages) were compared using phenotypic trajectory analysis. Our results show that early and late growth changes differ in style across species. The former seems to be far more plastic, being characterized by changes in the direction and magnitude of the allometric trajectory in the shell surface and sculpture morphospaces, respectively. On the other hand, late growth seems to be more conserved and channelled, showing more infrequent changes which mainly involve the magnitude of the trajectory across the surface morphospace. Therefore, the distinctive features of each species would had been acquired early in life, with later changes involving a general trend towards elongation of the shell, thus challenging the view that early development is more conserved in evolution. These findings can have important implications for the evolution of Steinmanella, as heterochronic processes acting upon ontogenetic variation is thought to be a major driver of bivalve evolution.
publishDate 2019
dc.date.none.fl_str_mv 2019
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/11336/159306
Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina); 11th North American Paleontological Convention; Riverside; Estados Unidos; 2019; 247-248
0031-0298
CONICET Digital
CONICET
url http://hdl.handle.net/11336/159306
identifier_str_mv Allometric variation in the genus Steinmanella (Trigonioida, Bivalvia) from the Lower Cretaceous of the Neuquén Basin (west-central Argentina); 11th North American Paleontological Convention; Riverside; Estados Unidos; 2019; 247-248
0031-0298
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://escholarship.org/uc/item/6r18f8wn
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.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv University of California Museum of Paleontology
publisher.none.fl_str_mv University of California Museum of Paleontology
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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