Shell variability in Tawera gayi (Veneridae) from southern SouthAmerica: A morphometric approach based on contour analysis
| Autor: | Javiera Cárdenas, Sandra Gordillo, Federico Márquez, Miguel Angel Zubimendi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
biology
BIVALVIA Ecology MAGELLAN REGION Veneridae Aquatic Science Biología Marina Limnología Bivalvia biology.organism_classification Tawera gayi MORPHOMETIRCS TAWERA GAYI Ciencias Biológicas Oceanography Geography Common species Genus Quaternary Southern Hemisphere Mollusca CIENCIAS NATURALES Y EXACTAS SHELL SHAPE |
| Popis: | 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. Fil: Gordillo, Sandra. Universidad Nacional de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigaciones en Ciencias de la Tierra. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Centro de Investigaciones en Ciencias de la Tierra; Argentina Fil: Marquez, Federico. Universidad Nacional de Córdoba; Argentina Fil: Cardenas, Javiera. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina Fil: Zubimendi, Miguel Angel. Departamento de Arqueologıa, Museo de La Plata, FCNyM, UNLP and Universidad Nacional de la Patagonia Austral–Unidad Academica Caleta Olivia; Argentina |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|