CICTERRA 20351
CENTRO DE INVESTIGACIONES EN CIENCIAS DE LA TIERRA
Unidad Ejecutora - UE
artículos
Título:
Heterotopy and heterochrony in the palaeotaxodont bivalve Natasia boliviensis (Babin and Branisa) from the Early Ordovician of northwestern Argentina.
Autor/es:
SÁNCHEZ, T.M.
Revista:
Ameghiniana
Editorial:
Asociación Paleontológica Argentina
Referencias:
Lugar: Buenos Aires; Año: 2009 vol. 46 p. 235 - 239
ISSN:
0002-7014
Resumen:
In the past years a great number of contributions concerning heterochronic processes (partial or complete temporal changes through ontogeny) have been produced, but few papers dealing on heterotopy -spatial changes- have been reported. Material of Natasia boliviensis (Babin and Branisa), from the early Ordovician of the northwestern Argentina, includes specimens at different stages of growth, from smaller, juvenil individuals, with taxodont dentition, to greater, adult individuals, with actinodont dentition. Ontogenetic development of dentition could be interpreted as an heterotopic change from a possible praenuculid ancestor, and changes in outline shell could be adressed to heterochrony.
