Resumo

TABOADA, María de los Á.; MARTINEZ DE MARCO, Silvia N.; BUSTOS, M. Soledad  e  TRACANNA, Beatriz. New records of Bacillariophyceae in lotic ecosystems of Argentinian Northwest II. Lilloa [online]. 2018, vol.55, n.1, pp.1-10. ISSN 0075-9481.  http://dx.doi.org/D.O.I.:doi.org/10.30550/j.lil/2018.55.1/7.

Diatoms (Bacillariophyceae) are an important component of aquatic taxocenosis that can live in a wide variety of habitats, which are very common and abundant organ-isms in NOA's lotic ecosystems. The objective of this work was to present 20 new records of these microalgae: 3 new citations for the country, 5 for the Northwest region and 12 new records for Tucumán. Seasonal samplings were carried out from 2012 to 2014 in Calimayo and Mista streams (both belonging to the Sali river basin). Biological data (epilithon and phy-toplankton) were collected "in situ". Abiotic factors were measured according to conventional methodologies. Descriptions of the species were made and morphometric characteristics were obtained, the geographic distribution and autoecological traits of the taxa registered for the first time for the NOA and the country were analyzed. Microphotographs (MO) of the cited species were incorporated. This contribution allowed to increase the knowledge, distribution and autoecology of the diatom species analyzed.

Palavras-chave : Diatomeas; Noroeste Argentino; Sistemas hídricos..

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