The bivalves from the Scotia Arc islands: species richness and faunistic affinities

Species richness of the shallow-water bivalves from the Scotia Arc islands was studied on the basis of new collections and by reviewing extant information. Seventy-three species are recognised from the entire area. South Georgia, the South Orkney Islands and the South Shetland Islands were similar i...

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Bibliographic Details
Published in:Scientia Marina
Main Author: Diego G. Zelaya
Format: Article in Journal/Newspaper
Language:English
Published: Consejo Superior de Investigaciones Científicas 2005
Subjects:
diversity
biogeography
molluscs
bivalvia
scotia sea
antarctic
Aquaculture. Fisheries. Angling
SH1-691
Antarctic
The Antarctic
Scotia Sea
South Shetland Islands
Weddell
South Orkney Islands
Antarc*
Online Access:https://doi.org/10.3989/scimar.2005.69s2113
https://doaj.org/article/59b15c06e71e4902a2b3f196078eaf88
Description
Summary:Species richness of the shallow-water bivalves from the Scotia Arc islands was studied on the basis of new collections and by reviewing extant information. Seventy-three species are recognised from the entire area. South Georgia, the South Orkney Islands and the South Shetland Islands were similar in species richness to the Antarctic Weddell sector. New records for 51 bivalve species are provided and the presence of 18 undescribed species is reported. The faunistic similarity of the islands of the Scotia Arc to the Magellan region and the Antarctic Weddell sector is re-examined. These islands show a high similarity to the Antarctic Weddell sector (49 to 85%) and a low similarity to the Magellan region (12 to 32%). Evidence from bivalves clearly supports the placement of the Scotia Arc islands within the Antarctic region.

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