Diversity of the present ostracofauna in lagoons of the central region of the Republic Argentina

In this work, the present ostracofauna in the "Laguna Don Tomás" (36 º 18 ´ 18.31 " S and 64 º 18 ´ 49.02? W), located in the city of Santa Rosa, La Pampa, Argentina, is studied. Seasonal studies were carried out, 1447 valves and shells were recovered. Four species were identified and specimens of Heterocypris símilis with Oichnuns simplex were found. In all the samples, H. similis was the dominant species which would indicate a high degree of eutrophication in the area of study and it would allow to take this species how bioindicator of pollution.Fil: Kihn, Romina Gisela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Argentino de Oceanografía (i); ArgentinaFil: Pall, José Luis María. Universidad Nacional de la Pampa. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin