Morphological variability of the nanoplanktonic diatom Thalassiosira laevis from coastal waters of Province of Buenos Aires (Argentina)

Abstract

Morphological variability of the nanoplanktonic diatom Thalassiosira laevis from coastal waters of Province of Buenos Aires (Argentina). Despite the fact that the genus Thalassiosira was previous and extensively studied including ultrastructural analysis of species found in phytoplanktonic samples collected from marine waters of Argentina, nanoplanktonic species have been frequently overlooked. This paper is devoted to show the morphological variation of Thalassiosira laevis, a nanoplanktonic species collected from marine coastal waters of the Province of Buenos Aires, to compare Argentinean material with those from China, Korea and Brazil described in the literature, and to record it for the first time from Argentina.

A pesar del hecho de que el género Thalassiosira ha sido previa y extensivamente estudiado incluyendo análisis ultraestructural de especies encontradas en muestras fitoplanctónicas colectadas de aguas marinas de Argentina, las especies nanoplanctónicas han sido frecuentemente pasadas por alto. Este trabajo está dedicado a mostrar la variabilidad morfológica de Thalassiosira laevis, una especie nanoplanctónica de aguas marinas costeras de la Provincia de Buenos Aires, a comparar el material con aquellos procedentes de China, Korea y Brasil descriptos en la literatura y a reportarla por primera vez para Argentina.