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Anales del Instituto de la Patagonia

On-line version ISSN 0718-686X

Abstract

HROMIC, Tatiana; CAMBLOR, María  and  QUEZADA, Lyta. Textularids Foraminifers from recent shallow sediments of the Antarctic Peninsula and theyr relationship with Southern Southamerican Region. Anales Instituto Patagonia (Chile) [online]. 2012, vol.40, n.1, pp. 125-138. ISSN 0718-686X.  http://dx.doi.org/10.4067/S0718-686X2012000100017.

Forty nine samples, of superficial marine sediments (< 50m.) from 3 localities: Deception Island, Chile Bay and Fildes Bay, Antarctic península were analysed in order to investigate the foraminiferers of suborder Textulariina Delage y Herouard, 1886. Twenty two species were identifed and classiffed en 12 families and 15 generas. The most abundant species were Trochammina malovensis (53,2%), Milia-mmina arenácea (16,3%) y Reophax dentaliniformis (6,7%). Deception Island contributed with most of the specimens (57%) and Chile Bay with the highest number of species. Thes most common species in the area were Trochammina malovensis (95,9% of the samples), Miliammina arenácea (73,5%), Spiro-plectammina biformis (63,3%) and Trochammina squamata (61,2%). Hierarchical cluster analysis and ANOSIM showed there is not communities differences between bays. Ten species (from 22) could not be found in the southernmost southamerica: Alveolophragmiun columbiense, Deuterammina glabra, Eggerella minuta, Pseudobolivina antarctica, Reophax nodulosus, Rhabdammina linnearis, Saccam-mina sphaerica, Textularia wiesneri, Trochammina malovensis and T. quadriloba. Probably they are endemic species for the Antarctic region.

Keywords : Textulariina; shallow water; Deception Island; Fildes Bay; Chile Bay; Antártica.

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