Quaternary molluscan faunas from the island of Tierra del Fuego after the Last Glacial Maximum

Palaeontological 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 change...

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Bibliographic Details
Published in:Scientia Marina
Main Authors: Sandra Gordillo, Andrea Maria Josefa Coronato, Jorge Oscar Rabassa
Format: Article in Journal/Newspaper
Language:English
Published: Consejo Superior de Investigaciones Científicas 2005
Subjects:
mollusc assemblages
tierra del fuego
beagle channel
palaeoenvironments
quaternary
Aquaculture. Fisheries. Angling
SH1-691
Antarc*
Antarctica
Tierra del Fuego
Online Access:https://doi.org/10.3989/scimar.2005.69s2337
https://doaj.org/article/69c96afef398430fb3b75d977b087f26
Description
Summary:Palaeontological 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 palaeofaunas overlap slightly at the species level, but have a considerable number of genera (23%) and families (50%) in common. These affinities and relationships are better explained on the basis of more recent migrating taxa than by ancient connections when the two regions formed part of the Weddellian Province.

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