The genus Stichothamnion (Rhodomelaceae) was described by Borgesen in 1930, on the basis of material from the north western coast of Gran Canaria (Canary Islands). During our investigation of marine algae collected from the Netherlands Antilles it appeared that on St. Eustatius (Lesser Antilles) an unknown species was gathered, that also has to be placed in the genus Stichothamnion. This material was of sufficient quality to allow a complete description of the species.