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New and poorly known benthic foraminifera (Protista, Rhizaria) inhabiting the shells of planktonic foraminifera on the bathyal Mid-Atlantic Ridge

New and poorly known benthic foraminifera (Protista, Rhizaria) inhabiting the shells of planktonic foraminifera on the bathyal Mid-Atlantic Ridge
New and poorly known benthic foraminifera (Protista, Rhizaria) inhabiting the shells of planktonic foraminifera on the bathyal Mid-Atlantic Ridge
Based on sediment samples from the Mid-Atlantic Ridge (MAR; 49–54°N, 2508–2772 m water depth) we redescribe Hospitella fulva Rhumbler, 1911, an organic-walled foraminiferal species that inhabits the empty shells of planktonic foraminifera and has not been reported since its initial description more than 100 years ago. This poorly known species is characterized by a series of more or less globular ‘pseudo-chambers’ joined by tubular stolons and with an organic, brownish-orange, somewhat brittle test wall. It is probably related to Placopsilinella aurantiaca Earland, 1934, a species that is commonly attached to the external surface of planktonic foraminiferal shells at our MAR sites. A second inhabiting foramininferan, which we describe as Incola inculta gen. & sp. nov., is distinguished from H. fulva by the very thin and flexible organic test wall and the distinct tubular to somewhat conical agglutinated structure, which extends above the surface of the host shell and terminates in an aperture. A large number of xanthosomes (waste products) are distributed throughout the cell body of the new species. These and other inhabitants of planktonic foraminiferal shells make an important contribution to benthic foraminiferal assemblages on the bathyal MAR.
North Atlantic, ECOMAR, MAR-ECO, deep-sea protists, organic-walled foraminifera
1745-1000
447-461
Gooday, Andrew J.
d9331d67-d518-4cfb-baed-9df3333b05b9
Rothe, Nina
c89f2da3-d68b-4a3a-9f96-d2212a8195b9
Pearce, Richard B.
7d772b25-3ad0-4909-9a96-3a1a8111bc2f
Gooday, Andrew J.
d9331d67-d518-4cfb-baed-9df3333b05b9
Rothe, Nina
c89f2da3-d68b-4a3a-9f96-d2212a8195b9
Pearce, Richard B.
7d772b25-3ad0-4909-9a96-3a1a8111bc2f

Gooday, Andrew J., Rothe, Nina and Pearce, Richard B. (2013) New and poorly known benthic foraminifera (Protista, Rhizaria) inhabiting the shells of planktonic foraminifera on the bathyal Mid-Atlantic Ridge. [in special issue: Benthos of the Sub-Polar Front Area on the Mid-Atlantic Ridge: Results of the ECOMAR Project] Marine Biology Research, 9 (5-6), 447-461. (doi:10.1080/17451000.2012.750365).

Record type: Article

Abstract

Based on sediment samples from the Mid-Atlantic Ridge (MAR; 49–54°N, 2508–2772 m water depth) we redescribe Hospitella fulva Rhumbler, 1911, an organic-walled foraminiferal species that inhabits the empty shells of planktonic foraminifera and has not been reported since its initial description more than 100 years ago. This poorly known species is characterized by a series of more or less globular ‘pseudo-chambers’ joined by tubular stolons and with an organic, brownish-orange, somewhat brittle test wall. It is probably related to Placopsilinella aurantiaca Earland, 1934, a species that is commonly attached to the external surface of planktonic foraminiferal shells at our MAR sites. A second inhabiting foramininferan, which we describe as Incola inculta gen. & sp. nov., is distinguished from H. fulva by the very thin and flexible organic test wall and the distinct tubular to somewhat conical agglutinated structure, which extends above the surface of the host shell and terminates in an aperture. A large number of xanthosomes (waste products) are distributed throughout the cell body of the new species. These and other inhabitants of planktonic foraminiferal shells make an important contribution to benthic foraminiferal assemblages on the bathyal MAR.

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More information

Published date: April 2013
Keywords: North Atlantic, ECOMAR, MAR-ECO, deep-sea protists, organic-walled foraminifera
Organisations: Marine Biogeochemistry, Ocean Biochemistry & Ecosystems

Identifiers

Local EPrints ID: 352177
URI: http://eprints.soton.ac.uk/id/eprint/352177
ISSN: 1745-1000
PURE UUID: 117fdead-8ecd-4f1f-87d9-25a724b16865

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Date deposited: 03 May 2013 10:35
Last modified: 14 Mar 2024 13:48

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Contributors

Author: Andrew J. Gooday
Author: Nina Rothe

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