Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean

Autores
Signorelli, Javier Hernan; Scarabino, Fabrizio
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A common mactrid from the southwestern Atlantic Ocean has been largely misunderstood in the literature. Since the early 20th century, this species has been referred to as Mactra patagonica d'Orbigny, 1846. However, the latter is recorded in Quaternary deposits of Northern Patagonia. Mactra guidoi n. sp. is described herein, including its shell ultrastructure, hinge features, and soft parts, and compared with the holotype of M. patagonica. To compare and to correctly identify both species, a morphometric analysis was carried out using conventional and geometric morphometric methods. Mactra guidoi n. sp. has an elongate shell that is more fragile than that of M. patagonica. In addition, its ventral posterior edge is usually sinuous. The ultrastructure of the shell reveals two layers with cross lamellar structure. The anatomical features agree with those of the congeneric M. isabelleana, although they differ in the morphology of the labial palps and foot. Morphometric analysis revealed significant differences between M. patagonica and the new species. The relative warp analysis allows us to understand the variation recognized by using CVA. Only M. patagonica revealed significant allometry between Relative Warp and Centroid size. Finally, the comparison of the types clearly points towards the existence of two different species.
Fil: Signorelli, Javier Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
Fil: Scarabino, Fabrizio. Museo Nacional de Historia Natural y Antropologia; Uruguay
Materia
ANATOMY
GEOMETRIC
MACTRA
MORPHOMETRIC
SOUTHWESTERN ATLANTIC
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:11336/94381
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic OceanSignorelli, Javier HernanScarabino, FabrizioANATOMYGEOMETRICMACTRAMORPHOMETRICSOUTHWESTERN ATLANTIChttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1A common mactrid from the southwestern Atlantic Ocean has been largely misunderstood in the literature. Since the early 20th century, this species has been referred to as Mactra patagonica d'Orbigny, 1846. However, the latter is recorded in Quaternary deposits of Northern Patagonia. Mactra guidoi n. sp. is described herein, including its shell ultrastructure, hinge features, and soft parts, and compared with the holotype of M. patagonica. To compare and to correctly identify both species, a morphometric analysis was carried out using conventional and geometric morphometric methods. Mactra guidoi n. sp. has an elongate shell that is more fragile than that of M. patagonica. In addition, its ventral posterior edge is usually sinuous. The ultrastructure of the shell reveals two layers with cross lamellar structure. The anatomical features agree with those of the congeneric M. isabelleana, although they differ in the morphology of the labial palps and foot. Morphometric analysis revealed significant differences between M. patagonica and the new species. The relative warp analysis allows us to understand the variation recognized by using CVA. Only M. patagonica revealed significant allometry between Relative Warp and Centroid size. Finally, the comparison of the types clearly points towards the existence of two different species.Fil: Signorelli, Javier Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; ArgentinaFil: Scarabino, Fabrizio. Museo Nacional de Historia Natural y Antropologia; UruguayInstitute of Malacology2010-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/94381Signorelli, Javier Hernan; Scarabino, Fabrizio; Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean; Institute of Malacology; Malacologia; 52; 1; 1-2010; 31-420076-2997CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.4002/040.052.0103info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/malacologia/volume-52/issue-1/040.052.0103/Mactra-guidoi-n-sp-and-Mactra-patagonica-Bivalvia--Mactridae/10.4002/040.052.0103.shortinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:13:53Zoai:ri.conicet.gov.ar:11336/94381instacron: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:34982025-10-15 15:13:54.195CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean
title Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean
spellingShingle Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean
Signorelli, Javier Hernan
ANATOMY
GEOMETRIC
MACTRA
MORPHOMETRIC
SOUTHWESTERN ATLANTIC
title_short Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean
title_full Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean
title_fullStr Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean
title_full_unstemmed Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean
title_sort Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean
dc.creator.none.fl_str_mv Signorelli, Javier Hernan
Scarabino, Fabrizio
author Signorelli, Javier Hernan
author_facet Signorelli, Javier Hernan
Scarabino, Fabrizio
author_role author
author2 Scarabino, Fabrizio
author2_role author
dc.subject.none.fl_str_mv ANATOMY
GEOMETRIC
MACTRA
MORPHOMETRIC
SOUTHWESTERN ATLANTIC
topic ANATOMY
GEOMETRIC
MACTRA
MORPHOMETRIC
SOUTHWESTERN ATLANTIC
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A common mactrid from the southwestern Atlantic Ocean has been largely misunderstood in the literature. Since the early 20th century, this species has been referred to as Mactra patagonica d'Orbigny, 1846. However, the latter is recorded in Quaternary deposits of Northern Patagonia. Mactra guidoi n. sp. is described herein, including its shell ultrastructure, hinge features, and soft parts, and compared with the holotype of M. patagonica. To compare and to correctly identify both species, a morphometric analysis was carried out using conventional and geometric morphometric methods. Mactra guidoi n. sp. has an elongate shell that is more fragile than that of M. patagonica. In addition, its ventral posterior edge is usually sinuous. The ultrastructure of the shell reveals two layers with cross lamellar structure. The anatomical features agree with those of the congeneric M. isabelleana, although they differ in the morphology of the labial palps and foot. Morphometric analysis revealed significant differences between M. patagonica and the new species. The relative warp analysis allows us to understand the variation recognized by using CVA. Only M. patagonica revealed significant allometry between Relative Warp and Centroid size. Finally, the comparison of the types clearly points towards the existence of two different species.
Fil: Signorelli, Javier Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
Fil: Scarabino, Fabrizio. Museo Nacional de Historia Natural y Antropologia; Uruguay
description A common mactrid from the southwestern Atlantic Ocean has been largely misunderstood in the literature. Since the early 20th century, this species has been referred to as Mactra patagonica d'Orbigny, 1846. However, the latter is recorded in Quaternary deposits of Northern Patagonia. Mactra guidoi n. sp. is described herein, including its shell ultrastructure, hinge features, and soft parts, and compared with the holotype of M. patagonica. To compare and to correctly identify both species, a morphometric analysis was carried out using conventional and geometric morphometric methods. Mactra guidoi n. sp. has an elongate shell that is more fragile than that of M. patagonica. In addition, its ventral posterior edge is usually sinuous. The ultrastructure of the shell reveals two layers with cross lamellar structure. The anatomical features agree with those of the congeneric M. isabelleana, although they differ in the morphology of the labial palps and foot. Morphometric analysis revealed significant differences between M. patagonica and the new species. The relative warp analysis allows us to understand the variation recognized by using CVA. Only M. patagonica revealed significant allometry between Relative Warp and Centroid size. Finally, the comparison of the types clearly points towards the existence of two different species.
publishDate 2010
dc.date.none.fl_str_mv 2010-01
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/11336/94381
Signorelli, Javier Hernan; Scarabino, Fabrizio; Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean; Institute of Malacology; Malacologia; 52; 1; 1-2010; 31-42
0076-2997
CONICET Digital
CONICET
url http://hdl.handle.net/11336/94381
identifier_str_mv Signorelli, Javier Hernan; Scarabino, Fabrizio; Mactra guidoi n. sp. and Mactra patagonica (Bivalvia: Mactridae), two long misunderstood species from Southwestern Atlantic Ocean; Institute of Malacology; Malacologia; 52; 1; 1-2010; 31-42
0076-2997
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.4002/040.052.0103
info:eu-repo/semantics/altIdentifier/url/https://bioone.org/journals/malacologia/volume-52/issue-1/040.052.0103/Mactra-guidoi-n-sp-and-Mactra-patagonica-Bivalvia--Mactridae/10.4002/040.052.0103.short
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
dc.publisher.none.fl_str_mv Institute of Malacology
publisher.none.fl_str_mv Institute of Malacology
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 13.22299

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