Dear colleagues, We are pleased to announce the publication of our new paper: Gariboldi, M. C., Túnez, J. I., Failla, M., Hevia, M., Panebianco, M. V., Paso Viola, M. N., Vitullo, A. D. and Cappozzo, H. L. (2016), Patterns of population structure at microsatellite and mitochondrial DNA markers in the franciscana dolphin (*Pontoporia blainvillei*). Ecology and Evolution, 00: 1 –13. doi: 10.1002/ece3.2596 <http://dx.doi.org/10.1002/ece3.2596> ABSTRACT: The franciscana dolphin, *Pontorporia blainvillei*, is an endemic cetacean of the Atlantic coast of South America. Its coastal distribution and restricted movement patterns make this species vulnerable to anthropogenic factors, particularly to incidental bycatch. We used mitochondrial DNA control region sequences, 10 microsatellites, and sex data to investigate the population structure of the franciscana dolphin from a previously established management area, which includes the southern edge of its geographic range. *F*-statistics and Bayesian cluster analyses revealed the existence of three genetically distinct populations. Based on the microsatellite loci, similar levels of genetic variability were found in the area; 13 private alleles were found in Monte Hermoso, but none in Claromecó. When considering the mitochondrial DNA control region sequences, lower levels of genetic diversity were found in Monte Hermoso, when compared to the other localities. Low levels of gene flow were found between most localities. Additionally, no evidence of isolation by distance nor sex-biased dispersal was detected in the study area. In view of these results showing that populations from Necochea/Claromecó, Monte Hermoso, and Río Negro were found to be genetically distinct and the available genetic information for the species previously published, Argentina would comprise five distinct populations: Samborombón West/Samborombón South, Cabo San Antonio/Buenos Aires East, Necochea/Claromecó/Buenos Aires Southwest, Monte Hermoso, and Río Negro. In order to ensure the long-term survival of the franciscana dolphin, management and conservation strategies should be developed considering each of these populations as different management units. This paper is an Open Access publication and is freely available for view and download at the following link: http://onlinelibrary.wiley.com/doi/10.1002/ece3.2596/full Kind regards, Constanza -- Lic. María Constanza Gariboldi Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico - CEBBAD Universidad Maimónides Hidalgo 775 6to piso (1405) Tel: 4905 1192 Fax: 4905 1133