Abstract
The genus Ransonia Blandin, 1979 (Arachnida: Araneae) was established with description of a new species, Ransonia mahasoana of the family Pisauridae (Arachnida: Araneae) endemic from Mahasoa, Madagascar. Unfortunately, this name is preoccupied by Ransonia Kramp, 1947, a genus of the family Rhopalonematidae (Hydrozoa: Trachymedusae) with only one species, Ransonia (Aglantha) krampi Ranson (1932), from Gibraltar, Mediterranean. According to article 60 of the International Code of Zoological Nomenclature a new substitute name is necessary, since Ransonia Blandin, 1979 does not have a junior synonym applicable and is a junior homonym of another genus. Therefore, we propose a replacement name for the spider genus as follows.
References
- Blandin, P. (1979) Etudes sur les Pisauridae africaines XI. Genres peu connus ou nouveaux des Iles Canaries, du continent africain et de Madagascar (Araneae, Pisauridae). Revue de Zoologie Africaine, 93, 347–375. - Chapuis, F. (1869) Synopsis des Scolytides. J. Desoer, Liège, 56 pp. [reprinted in 1873 as: Mémoires de la Société Royale des Sciences de Liège, 2, 213–269] - Kramp, P.L. (1947) Medusae. Part III. Trachylina and Scyphozoa, with zoogeographical remarks on all the medusae of the northern Atlantic. Danish Ingolf Expedition, 5, 1–66. - Sars, G.O. (1883) Preliminary notices on the Schizopoda of H.M.S. Challenger Expedition. Forhandlinger i Videnskabsselskabet i Kristiania, 7, 1–43. 
 
		