Given problems with cryptic diversity in marine macroalgae, our identifications rely exclusively on generated barcodes (tufA, rbcL for most green algae; psbA and COI for brown algae; rbcL and COI for red algae). Data are subsequently used in biogeographical, systematic or large scale macroevolutionary studies. For phylogenetic purposes we usually concatenate several genes (e.g. Cocquyt et al. MBE 2010).