DIATOMS FROM THE HYPERSALINE LA AMARGA LAKE (LA PAMPA, ARGENTINA)

As part of a more comprehensive study of the diatom flora from La Pamp a province (Argentina), several samples collected in April 1991 and Oc tober 1992, from the hypersaline ''La Amarga'' lake (35 degrees 15'S, 63 degrees 05'W) were analized. Fifty three taxa were identified, from which five are new records for Argentina, two are new records for arg entine inland waters and fifteen of the remaining diatoms had nor been mentioned previously for the province. Ecological affinities of some taxa are discussed. Some comments about LM and SEM morphological featu res, taxonomy and distribution of several taxa are included.