Data on the presence of the genus <i>Dictyopteris</i> at different locations (Kenya, Seychelles, Tanzania, Mauritius, Socotra, South Africa, Egypt) in the western Indian Ocean. The dataset is based on herbarium material collected during expeditions conducted in 1985-1999. The data were digitized by VLIZ from the original report: De Smet, I. (2000). Taxonomische en biogeografische studie van het genus Dictyopteris (Dictyotales, Phaeophyta) in de westelijke Indische Oceaan. Taxonomic and biogeographic study of the genus Dictyopteris (Dictyotales, Phaeophyta) in the western Indian Ocean.. MSc Thesis. Rijksuniversiteit Gent. Faculteit Wetenschappen: Gent. 192 pp.