Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions
Extensive recent collections and taxonomical revisions provide a basis for the first zoogeographical analysis of Magellan Nudibranchia. Using 36 of 57 nominal species described in this area, the degree of endemism has been decreased from 70% to 31%. Very close faunistic relationships to northern Arg...
Published in: | Scientia Marina |
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Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
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Consejo Superior de Investigaciones Científicas
1999
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Online Access: | https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/928 https://doi.org/10.3989/scimar.1999.63s1409 |
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ftjscientiamarin:oai:scientiamarina.revistas.csic.es:article/928 |
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Open Polar |
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Scientia Marina (E-Journal) |
op_collection_id |
ftjscientiamarin |
language |
English |
topic |
Mollusca Opisthobranchia Nudibranchia Magellan Province Antarctica Zoogeography Provincia Magallánica Antártida zoogeografía |
spellingShingle |
Mollusca Opisthobranchia Nudibranchia Magellan Province Antarctica Zoogeography Provincia Magallánica Antártida zoogeografía Schrödl, Michael Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions |
topic_facet |
Mollusca Opisthobranchia Nudibranchia Magellan Province Antarctica Zoogeography Provincia Magallánica Antártida zoogeografía |
description |
Extensive recent collections and taxonomical revisions provide a basis for the first zoogeographical analysis of Magellan Nudibranchia. Using 36 of 57 nominal species described in this area, the degree of endemism has been decreased from 70% to 31%. Very close faunistic relationships to northern Argentina are evident as five of six known species (83%) are shared with the Magellan Province. With a 43% overlap of Magellan species in the southern part of the Peruvian faunal Province (44 species), this area shows a transitional character between cold- and warm-temperate waters. Only three of 36 Magellan species are found in common with the high Antarctic (ca. 30 species), revealing a low faunal similarity of about 10%. High Antarctic waters are characterized by high nudibranch endemism (about 80%). Of the ten nudibranch species reported from South Georgia, two are exclusively shared with Magellan, two with high Antarctic and three with both Magellan and Antarctic waters, indicating transitional, Subantarctic conditions. One species is endemic to South Georgia, two other species are insufficiently known and may or may not be endemic. Generally, the Antarctic Convergence appears to be a distributional barrier for Magellan nudibranchs. In contrast, some Antarctic nudibranch species extend far into the Atlantic, obviously with cold Antarctic deep water currents. Coastal, cold temperate Magellan nudibranchs have relatively low affinities to the deep water fauna off Argentina, which seems to be predominantly submerged Antarctic species, but this bathymetrical zonation needs to be further investigated. Recolecciones extensivas y revisiones taxonómicas actuales forman la base del primer análisis zoogeográfico de Nudibranchia magallánicos. Utilizando 36 de 57 especies nominales descritas de esta área, el grado de endemismo ha bajado desde 70% a 31%. Existen relaciones faunísticas muy próximas con el norte de Argentina ya que cinco de las seis especies conocidas (83%) son comunes con la Provincia Magallánica. Las especies magallánicas contribuyen 43% de las especies conocidas de la parte sur de la Provincia faunistíca Peruana (44 en total), indicando el carácter de transición de esta área entre aguas templado-frías y cálidas. Sólo tres de 36 especies magallánicas son comunes con zonas al sur de la Convergencia Antártica (ca. 30 especies), resultando una afinidad faunística muy baja, de aproximadamente 10%. Las aguas antárticas se caracterizan por un muy alto nivel de endemismo de nudibranquios (ca. 80%). De las diez especies de nudibranquios citadas en Georgia del Sur, dos son comunes con áreas magallánicas exclusivamente, dos con la Antártida y tres con aguas antárticas y magallánicas, señalando condiciones de transición, subantárticas. Una espécie es endémica de Georgia del Sur, otras dos se conocen de manera deficiente, por lo que existe la posibilidad de que también sean endémicas. En general, la Convergencia Antártica parece un límite distribucional para nudibranquios magallánicos. Sin embargo, algunas especies de nudibranquios antárticos se extienden mucho hacia el Atlántico, obviamente con aguas antárticas profundas. Los nudibranquios magallánicos de las zonas templadas-frías sublitorales tienen relativamente poca afinidad con la fauna del talud argentino, que parece dominada por especies antárticas sumergidas, pero esta zonación batimétrica necesita ser estudiada de forma más extensa en el futuro. |
format |
Article in Journal/Newspaper |
author |
Schrödl, Michael |
author_facet |
Schrödl, Michael |
author_sort |
Schrödl, Michael |
title |
Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions |
title_short |
Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions |
title_full |
Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions |
title_fullStr |
Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions |
title_full_unstemmed |
Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions |
title_sort |
zoogeographic relationships of magellan nudibranchia (mollusca: opisthobranchia) with particular reference to species from adjacent regions |
publisher |
Consejo Superior de Investigaciones Científicas |
publishDate |
1999 |
url |
https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/928 https://doi.org/10.3989/scimar.1999.63s1409 |
long_lat |
ENVELOPE(-62.933,-62.933,-64.883,-64.883) ENVELOPE(-57.629,-57.629,-61.898,-61.898) |
geographic |
Antarctic The Antarctic Baja Referencia Argentino Argentina Magallanes Límite |
geographic_facet |
Antarctic The Antarctic Baja Referencia Argentino Argentina Magallanes Límite |
genre |
Antarc* Antarctic Antarctica Antártica Antártida |
genre_facet |
Antarc* Antarctic Antarctica Antártica Antártida |
op_source |
Scientia Marina; Vol. 63 No. S1 (1999); 409-416 Scientia Marina; Vol. 63 Núm. S1 (1999); 409-416 1886-8134 0214-8358 10.3989/scimar.1999.63s1 |
op_relation |
https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/928/970 https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/928 doi:10.3989/scimar.1999.63s1409 |
op_rights |
Copyright (c) 1999 Consejo Superior de Investigaciones Científicas (CSIC) https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3989/scimar.1999.63s1409 https://doi.org/10.3989/scimar.1999.63s1 |
container_title |
Scientia Marina |
container_volume |
63 |
container_issue |
S1 |
container_start_page |
409 |
op_container_end_page |
416 |
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1766159311449358336 |
spelling |
ftjscientiamarin:oai:scientiamarina.revistas.csic.es:article/928 2023-05-15T13:41:51+02:00 Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions Relaciones zoogeográficas de Nudibranchia (Mollusca: Opisthobranchia) de Magallanes con referencia especial a las especies de regiones adyacentes Schrödl, Michael 1999-12-30 application/pdf https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/928 https://doi.org/10.3989/scimar.1999.63s1409 eng eng Consejo Superior de Investigaciones Científicas https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/928/970 https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/928 doi:10.3989/scimar.1999.63s1409 Copyright (c) 1999 Consejo Superior de Investigaciones Científicas (CSIC) https://creativecommons.org/licenses/by/4.0 CC-BY Scientia Marina; Vol. 63 No. S1 (1999); 409-416 Scientia Marina; Vol. 63 Núm. S1 (1999); 409-416 1886-8134 0214-8358 10.3989/scimar.1999.63s1 Mollusca Opisthobranchia Nudibranchia Magellan Province Antarctica Zoogeography Provincia Magallánica Antártida zoogeografía info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed article Artículo revisado por pares 1999 ftjscientiamarin https://doi.org/10.3989/scimar.1999.63s1409 https://doi.org/10.3989/scimar.1999.63s1 2022-03-20T16:30:54Z Extensive recent collections and taxonomical revisions provide a basis for the first zoogeographical analysis of Magellan Nudibranchia. Using 36 of 57 nominal species described in this area, the degree of endemism has been decreased from 70% to 31%. Very close faunistic relationships to northern Argentina are evident as five of six known species (83%) are shared with the Magellan Province. With a 43% overlap of Magellan species in the southern part of the Peruvian faunal Province (44 species), this area shows a transitional character between cold- and warm-temperate waters. Only three of 36 Magellan species are found in common with the high Antarctic (ca. 30 species), revealing a low faunal similarity of about 10%. High Antarctic waters are characterized by high nudibranch endemism (about 80%). Of the ten nudibranch species reported from South Georgia, two are exclusively shared with Magellan, two with high Antarctic and three with both Magellan and Antarctic waters, indicating transitional, Subantarctic conditions. One species is endemic to South Georgia, two other species are insufficiently known and may or may not be endemic. Generally, the Antarctic Convergence appears to be a distributional barrier for Magellan nudibranchs. In contrast, some Antarctic nudibranch species extend far into the Atlantic, obviously with cold Antarctic deep water currents. Coastal, cold temperate Magellan nudibranchs have relatively low affinities to the deep water fauna off Argentina, which seems to be predominantly submerged Antarctic species, but this bathymetrical zonation needs to be further investigated. Recolecciones extensivas y revisiones taxonómicas actuales forman la base del primer análisis zoogeográfico de Nudibranchia magallánicos. Utilizando 36 de 57 especies nominales descritas de esta área, el grado de endemismo ha bajado desde 70% a 31%. Existen relaciones faunísticas muy próximas con el norte de Argentina ya que cinco de las seis especies conocidas (83%) son comunes con la Provincia Magallánica. Las especies magallánicas contribuyen 43% de las especies conocidas de la parte sur de la Provincia faunistíca Peruana (44 en total), indicando el carácter de transición de esta área entre aguas templado-frías y cálidas. Sólo tres de 36 especies magallánicas son comunes con zonas al sur de la Convergencia Antártica (ca. 30 especies), resultando una afinidad faunística muy baja, de aproximadamente 10%. Las aguas antárticas se caracterizan por un muy alto nivel de endemismo de nudibranquios (ca. 80%). De las diez especies de nudibranquios citadas en Georgia del Sur, dos son comunes con áreas magallánicas exclusivamente, dos con la Antártida y tres con aguas antárticas y magallánicas, señalando condiciones de transición, subantárticas. Una espécie es endémica de Georgia del Sur, otras dos se conocen de manera deficiente, por lo que existe la posibilidad de que también sean endémicas. En general, la Convergencia Antártica parece un límite distribucional para nudibranquios magallánicos. Sin embargo, algunas especies de nudibranquios antárticos se extienden mucho hacia el Atlántico, obviamente con aguas antárticas profundas. Los nudibranquios magallánicos de las zonas templadas-frías sublitorales tienen relativamente poca afinidad con la fauna del talud argentino, que parece dominada por especies antárticas sumergidas, pero esta zonación batimétrica necesita ser estudiada de forma más extensa en el futuro. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antártica Antártida Scientia Marina (E-Journal) Antarctic The Antarctic Baja Referencia Argentino Argentina Magallanes ENVELOPE(-62.933,-62.933,-64.883,-64.883) Límite ENVELOPE(-57.629,-57.629,-61.898,-61.898) Scientia Marina 63 S1 409 416 |