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...
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Consejo Superior de Investigaciones Científicas
1999
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ftdoajarticles:oai:doaj.org/article:87b996df4ee14afc808fa86886357485 2023-05-15T13:42:49+02:00 Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions Michael Schrödl 1999-12-01T00:00:00Z https://doi.org/10.3989/scimar.1999.63s1409 https://doaj.org/article/87b996df4ee14afc808fa86886357485 EN eng Consejo Superior de Investigaciones Científicas http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/928 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.1999.63s1409 https://doaj.org/article/87b996df4ee14afc808fa86886357485 Scientia Marina, Vol 63, Iss S1, Pp 409-416 (1999) mollusca opisthobranchia nudibranchia magellan province antarctica zoogeography Aquaculture. Fisheries. Angling SH1-691 article 1999 ftdoajarticles https://doi.org/10.3989/scimar.1999.63s1409 2022-12-31T10:38:38Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Argentina Scientia Marina 63 S1 409 416 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
mollusca opisthobranchia nudibranchia magellan province antarctica zoogeography Aquaculture. Fisheries. Angling SH1-691 |
spellingShingle |
mollusca opisthobranchia nudibranchia magellan province antarctica zoogeography Aquaculture. Fisheries. Angling SH1-691 Michael Schrödl Zoogeographic relationships of Magellan Nudibranchia (Mollusca: Opisthobranchia) with particular reference to species from adjacent regions |
topic_facet |
mollusca opisthobranchia nudibranchia magellan province antarctica zoogeography Aquaculture. Fisheries. Angling SH1-691 |
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. |
format |
Article in Journal/Newspaper |
author |
Michael Schrödl |
author_facet |
Michael Schrödl |
author_sort |
Michael Schrödl |
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://doi.org/10.3989/scimar.1999.63s1409 https://doaj.org/article/87b996df4ee14afc808fa86886357485 |
geographic |
Antarctic The Antarctic Argentina |
geographic_facet |
Antarctic The Antarctic Argentina |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Scientia Marina, Vol 63, Iss S1, Pp 409-416 (1999) |
op_relation |
http://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/928 https://doaj.org/toc/0214-8358 https://doaj.org/toc/1886-8134 0214-8358 1886-8134 doi:10.3989/scimar.1999.63s1409 https://doaj.org/article/87b996df4ee14afc808fa86886357485 |
op_doi |
https://doi.org/10.3989/scimar.1999.63s1409 |
container_title |
Scientia Marina |
container_volume |
63 |
container_issue |
S1 |
container_start_page |
409 |
op_container_end_page |
416 |
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1766173181378297856 |