scholarly journals Paleoenvironmental interpretation of late Quaternary molluscan assemblages from southern South América: A taphonomic comparison between the Strait of Magellan and the Beagle Channel

2009 ◽  
Vol 36 (1) ◽  
Author(s):  
Javiera Cárdenas ◽  
Sandra Gordillo
Keyword(s):  
South America ◽  
Late Quaternary ◽  
Southern South America ◽  
Beagle Channel ◽  
Strait Of Magellan ◽  
The Strait Of Magellan ◽  
Paleoenvironmental Interpretation

scholarly journals Freshwater Invertebrates of Southwestern South America: Diversity, Biogeography, and Threats

2021 ◽  
Author(s):  
Claudio Valdovinos Zarges ◽  
Pablo Fierro ◽  
Viviana Olmos
Keyword(s):  
South America ◽  
Central Zone ◽  
The North ◽  
Current State ◽  
Strait Of Magellan ◽  
The Strait Of Magellan ◽  
Latitudinal Patterns ◽  
Diverse Groups ◽  
Biogeographic Analysis

This chapter reviews the current state of knowledge of invertebrates of rivers, lakes, and wetlands in western South America, from southern Peru to the Strait of Magellan in southern Chile. A characterization of the diverse groups of insects, mollusk crustaceans, and other smaller groups is presented, and a biogeographic analysis of them is made with emphasis on their main forcing factors, ecology, and threats in the Anthropocene. This fauna presents Gondwanic characteristics, with clear North–South latitudinal patterns, covering from the Desert of Atacama in the North, one of the most arid deserts of the world, to the rainy and cold regions of the southern end of South America. The central zone of this territory includes one of the global biodiversity “hot spots,” which currently presents serious threats associated with changes in habitat, introduction of invasive species, climate change, and overexploitation of aquatic resources.

Petrography and geochemistry of late Quaternary dune fields of western Argentina: Provenance of aeolian materials in southern South America

2010 ◽  
Vol 2 (1) ◽  
pp. 33-48 ◽  
Author(s):  
Alfonsina Tripaldi ◽  
Patricia L. Ciccioli ◽  
M. Susana Alonso ◽  
Steven L. Forman
Keyword(s):  
South America ◽  
Late Quaternary ◽  
Southern South America

Shell variability in Tawera gayi (Veneridae) from southern South America: a morphometric approach based on contour analysis

2010 ◽  
Vol 91 (4) ◽  
pp. 815-822 ◽  
Author(s):  
Sandra Gordillo ◽  
Federico Márquez ◽  
Javiera Cárdenas ◽  
Miguel Ángel Zubimendi
Keyword(s):  
South America ◽  
Late Quaternary ◽  
Common Species ◽  
Tierra Del Fuego ◽  
Elliptic Fourier Analysis ◽  
Contour Analysis ◽  
Southern South America ◽  
Morphological Variations ◽  
Marine Deposits ◽  
History Of

This study analyses the significance of shell morphological variations in the venerid clam Tawera gayi, a typical element of shallow marine soft bottoms in southern South America and the most common species recovered from Late Quaternary marine deposits along the Beagle Channel, Tierra del Fuego. Fossil and modern Tawera shells from different localities around the southern tip of South America were analysed using the Elliptic Fourier Analysis (EFA) method. Taking into account the palaeontological history of this genus in the southern hemisphere, EFA was also performed on shells of Tawera congeners from South Africa (T. philomela) and New Zealand (T. spissa). The use of EFA permitted the distinction between the three Tawera species and geographical differentiation in the T. gayi groups. These morphological variations of T. gayi appear best related to ecophenotypic plasticity as a response to different environmental conditions, although the palaeobiogeographical history of Tawera in South America cannot be ruled out.

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