Six species of Rhodomelaceae are reported from the Canary Islands for the first time: Aphanocladia stichidiosa
(Funk) Ardré, Polysiphonia funebris De Notaris, Polysiphonia ceramiaeformis P. L. Crouan et H. M. Crouan, Polysiphonia denudata (Dıllwyn) Greville er Harvey in W. J. Hooker, Polysiphonia harveyi Bailey and Polysiphonia
carettia Hollenberg. Data concerning morphology, phenology, habitat and geographical distribution of the species
are presented