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The Journal of Foraminiferal Research; October 2002; v. 32; no. 4; p. 364-374; DOI: 10.2113/0320364
© 2002 Cushman Foundation for Foraminiferal Research
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Article

STRUCTURE, TAXONOMY AND ECOLOGY OF ASTRAMMINA TRIANGULARIS (EARLAND), AN ALLOGROMIID-LIKE AGGLUTINATED FORAMINIFER FROM EXPLORERS COVE, ANTARCTICA

Samuel S. Bowser1,2, Joan M. Bernhard3, Andrea Habura1 and Andrew J. Gooday4

1 Wadsworth Center, New York State Department of Health, P.O. Box 509, Albany, NY 12201, U.S.A.
2 Department of Biomedical Sciences, The University at Albany, State University of New York, Albany, NY 12222, U.S.A.
3 Department of Environmental Health Sciences, University of South Carolina, Columbia, SC 29208, U.S.A.
4 Southampton Oceanography Centre, Empress Dock, Southampton S014 3ZH, United Kingdom.

Astrorhiza triangularis (Earland) is transferred to the genus Astrammina based on structural and molecular analyses of abundant material collected from Explorers Cove, McMurdo Sound, Antarctica. This large, unilocular agglutinated species was previously known from only 14 specimens collected on the Atlantic side of the Antarctic continent. It resembles Astrammina rara in possessing an allogromiid-like sarcode (cell body) and laminated theca surrounded by a large intratest space. Astrammina triangularis makes an important contribution to foraminiferal biomass in Explorers Cove. Live specimens are orientated upright in the sediment and, in laboratory experiments, feed on algal and metazoan prey.




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