INVESTIGADORES
CORONATO andrea Maria Josefa
artículos
Título:
Quaternary molluscan faunas from the island of Tierra del Fuego after the Last Glacial Maximum
Autor/es:
GORDILLO, S.; CORONATO, A.; RABASSA, J.
Revista:
SCIENTIA MARINA
Editorial:
CMIMA-CSIC
Referencias:
Año: 2005 vol. 69 p. 337 - 348
ISSN:
0214-8358
Resumen:
Paleontological studies on postglacial molluscan faunas from marine deposits located along the northern coast of the Beagle Channel (lat. 54° 55´S, long 68° 34 - 67° 11 W) showed differences of various molluscan assemblages during a period of climatic stability after deglaciation. Oceanographic changes, different local environmental conditions, and/or episodes of minor climatic fluctuations are pointed out as causes for the variations in faunal composition. Comparison with Quaternary molluscs from Antarctica showed that these paleofaunas overlap slightly at the species level, but have a considerable number of genera (23%) and families (50%) in common. These affinities and relationships are best explained on the basis of more recent migrating taxa originating in the highest southern latitudes around Antarctica than ancient connections when the two regions formed part of the Weddellian Province.
