A new ‘saccamminid’ genus (Rhizaria: Foraminifera), from 4400 m water depth in the Nazaré Canyon (NE Atlantic)
A new ‘saccamminid’ genus (Rhizaria: Foraminifera), from 4400 m water depth in the Nazaré Canyon (NE Atlantic)
We describe Bithekammina occulta, a new monothalamous agglutinated foraminiferan (‘saccamminid’) collected in multicore samples at 4400 m on the terrace of the lower Nazaré Canyon on the Portuguese margin. The test is spherical to oval, up to ~400 ?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 ?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 ?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’.
‘Saccamminid’, monothalamous foraminifera, Portuguese margin, Nazaré canyon, cyst, secondary agglutinated
structure
49-58
da Silva, Ana Aranda
93584367-08bf-4d23-b388-d47aa2f30173
Gooday, Andrew J.
d9331d67-d518-4cfb-baed-9df3333b05b9
Pearse, Richard B.
5e73e236-e582-4114-b82c-3a7684b9b98f
Cunha, Marina R.
f97b25ca-1a36-47ae-a48b-43800a6a6d51
2011
da Silva, Ana Aranda
93584367-08bf-4d23-b388-d47aa2f30173
Gooday, Andrew J.
d9331d67-d518-4cfb-baed-9df3333b05b9
Pearse, Richard B.
5e73e236-e582-4114-b82c-3a7684b9b98f
Cunha, Marina R.
f97b25ca-1a36-47ae-a48b-43800a6a6d51
da Silva, Ana Aranda, Gooday, Andrew J., Pearse, Richard B. and Cunha, Marina R.
(2011)
A new ‘saccamminid’ genus (Rhizaria: Foraminifera), from 4400 m water depth in the Nazaré Canyon (NE Atlantic).
Zootaxa, 2912, .
Abstract
We describe Bithekammina occulta, a new monothalamous agglutinated foraminiferan (‘saccamminid’) collected in multicore samples at 4400 m on the terrace of the lower Nazaré Canyon on the Portuguese margin. The test is spherical to oval, up to ~400 ?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 ?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 ?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’.
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More information
Published date: 2011
Keywords:
‘Saccamminid’, monothalamous foraminifera, Portuguese margin, Nazaré canyon, cyst, secondary agglutinated
structure
Organisations:
Marine Biogeochemistry
Identifiers
Local EPrints ID: 191759
URI: http://eprints.soton.ac.uk/id/eprint/191759
ISSN: 1175-5334
PURE UUID: ea9249b1-c187-4e90-9311-1f6c6ca1f40d
Catalogue record
Date deposited: 24 Jun 2011 09:38
Last modified: 08 Jan 2022 14:38
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Contributors
Author:
Ana Aranda da Silva
Author:
Andrew J. Gooday
Author:
Richard B. Pearse
Author:
Marina R. Cunha
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