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Artículo

Shell morphometric variations in a Patagonian Argentina clam (Ameghinomya antiqua) from the Mid-Pleistocene (MIS 7) to the present

Boretto, Gabriella MargheritaIcon ; Baranzelli, Matias CristianIcon ; Gordillo, SandraIcon ; Consoloni, I.; Zanchetta, G.; Moran, G.
Fecha de publicación: 11/2014
Editorial: Elsevier
Revista: Quaternary International
ISSN: 1040-6182
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Paleontología

Resumen

This study analyses the shell morphological variations in the venerid clam Ameghinomya antiqua recovered from Bustamante Bay, in Patagonia Argentina, from the Pleistocene (MIS 7eMIS 5) to the present. Fossil and modern A. antiqua shells were analyzed using the Elliptic Fourier Analysis (EFA) and landmark methods. Both methods were successful in separating the studied bivalves into four chronologic groups -MIS 7, MIS 5, Holocene and Modern-, showing significant shell shape and size variations throughout the considered period. The MIS 7 shells have an ovoid rounded shape, the MIS 5 shells exhibit an ovoid and marked prosogyrous condition, while Holocene and Modern shells are more rounded to subquadrangular. MIS 5 shells are also larger than the others groups. These morphological variations could be related to the phenotypic plasticity of A. antiqua as a response to different environmental conditions, representing the ability of this species to adapt to different sub-environments as an answer to substrate variations and the hydrological changes which apparently took place during the period.
Palabras clave: Ameghinomya Antiqua , Bivalvia , Pleistocene , Geometric Morphometrics
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/16001
URL: http://www.sciencedirect.com/science/article/pii/S1040618214006855
DOI: http://dx.doi.org/10.1016/j.quaint.2014.09.033
Colecciones
Articulos(IMBIV)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Citación
Boretto, Gabriella Margherita; Baranzelli, Matias Cristian; Gordillo, Sandra; Consoloni, I.; Zanchetta, G.; et al.; Shell morphometric variations in a Patagonian Argentina clam (Ameghinomya antiqua) from the Mid-Pleistocene (MIS 7) to the present; Elsevier; Quaternary International; 352; 11-2014; 48-58
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