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http://hdl.handle.net/10773/6596
Title: | A new 'saccamminid' genus (Rhizaria: Foraminifera), from 4400 m water depth in the Nazare Canyon (NE Atlantic) |
Author: | Silva, Ana Aranda da Gooday, Andrew J. Pearse, Richard B. Cunha, Marina R. |
Keywords: | Saccamminid Monothalamous foraminifera Portuguese margin Nazare canyon cyst Secondary agglutinated structure |
Issue Date: | 9-Jun-2011 |
Publisher: | Magnolia Press |
Abstract: | We describe Bithekammina occulta, a new monothalamous agglutinated foraminiferan ('saccamminid') collected in multicore samples at 4400 m on the terrace of the lower Nazare Canyon on the Portuguese margin. The test is spherical to oval, up to similar to 400 mu m in length, with a simple circular aperture. The wall has a very smooth surface with a distinct sheen in reflected light. It is <10 mu m thick and composed of very fine agglutinated plate-like clay particles and a thin inner organic layer. The most distinctive feature of the new species is that the test is contained within an agglutinated case ('secondary test') composed mainly of larger (10-50 mu m) quartz grains. The case is equipped with a long, narrow tube that originates near the aperture of the inner test and presumably acts as a channel through which pseudopodia are deployed. Secondary agglutinated structures have been described in a number of foraminifera, but never before in a 'saccamminid'. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/6596 |
ISSN: | 1175-5326 |
Publisher Version: | http://www.mapress.com/zootaxa |
Appears in Collections: | CESAM - Artigos DBio - Artigos PT Mar - Artigos |
Files in This Item:
File | Description | Size | Format | |
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47_ArandadaSilva_etal_2011.pdf | Documento principal | 3.83 MB | Adobe PDF | View/Open |
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