Dear Marmamers: The following manuscript has just been published: Caballero, S.; Santos, M.C. de O.; Sanches, A. and Mignucci-Giannoni. 2013. Initial description of the phylogeography, population structure and genetic diversity of Atlantic spotted dolphins from Brazil and the Caribbean, inferred from analyses of mitochondrial and nuclear DNA. Biochemical Systematics and Ecology, 48: 263-270. Abstract: We provide initial information regarding the population structure and genetic diversity of Stenella frontalis from the Caribbean and southeastern Brazil from analyses of mitochondrial control region sequences and sequences from the first intron of the a-lactalbumin gene. Comparisons with previously described S. frontalis sequences showed a high number of haplotypes shared between populations throughout their distribution range. High diversity was found for southeastern Brazil and Caribbean samples, and population structure analyses indicate significant differentiation among population units at the FST level, but not at the FST level. Significant differentiation at the FST level was found between the Caribbean population unit and all other populations units. These results suggest historical or present connectivity between the Azores and Madeira and the southeastern Brazil groups and population differentiation between the Caribbean and southeastern Brazil, supporting the notion of two separate stocks in the waters around the Atlantic coast of South America. Pdf files can be requested to: sotalia@gmail.com Cheers, Marcos C. -- Dr. Marcos César de Oliveira Santos Laboratório de Biologia da Conservação de Mamíferos Aquáticos Departamento de Oceanografia Biológica, Instituto Oceanográfico, Universidade de São Paulo Praça do Oceanográfico, 191, Sala 145-A Butantã, São Paulo, SP, Brasil, 05508-120