The benthic algal flora reported for the Revillagigedo Islands comprises 20 specific infraspecific taxa : 2 Chlorophyta, 29 Phaeophyta and 13 Rhodophyta . This insular flora shares 131 taxa ( %) with other regions of the Mexican Pacific and
(3 %) are restricted apparently to the islands . One hundred three taxa ( 0%) are shared with areas of the Mexican tropical Pacific, 9 (3 %) with warm temperate Pacific Mexico and (32%) with La Paz, the transitional zone between tropical and warm temperate Pacific Mexico . Considering more general regions, the Revillagigedo Islands flora includes apparently restricted distribution (3 spp ., 1 . %), exclusively tropical ( 1 spp ., 2 %) and widely distributed eastern Pacific (33 spp ., 1 %) taxa . Even though we consider that the inventory of the Revillagigedo Islands and to a lesser degree the eastern tropical Pacific flora is still incomplete and in need of further taxonomic study, the floristic comparison shows a greater affinity of the Revillagigedo Islands flora with the Mexican tropical Pacific than with any other part of Mexico .