A molecular genetic analysis of Coris julis from different sites in the Med
iterranean and the Atlantic and C. atlantica from the Cabo Verde Islands wa
s applied to infer phylogenetic relationships between the taxa. More precis
ely, partial 12S mitochondrial rDNA sequence data were used in maximum pars
imony, neighbour-joining, and maximum likelihood analysis to generate phylo
genetic trees. The polymorphism observed indicated an important differentia
tion between the C. atlantica and C. julis specimens and supported the exis
tence of two different species.