RT info:eu-repo/semantics/article T1 Vegetative and reproductive morphology of Dudresnaya canariensis sp. nov. (Dumontiaceae, Rhodophyta) A1 Afonso Carrillo, Julio A1 Tabares, Nieves A1 Sansón Acedo, Marta A1 Reyes, Javier A2 BotánicaEcología y Fisiología Vegetal A2 Botánica Marina AB The marine red alga Dudresnaya canariensis sp. nov. (Dumontiaceae, Gigartinales) from the Canary Islands is described.Gametophytes are terete and radially branched, young branches are nonannulate, outer cortical cells are cylindrical, axialcells contain hexagonal crystals, cells of primary axes are conspicuous, and rhizoids reach 95 fLm in diameter. Spermatangialmother cells occur in corymbose clusters on the outer cortex, and carpogonial and auxiliary-cell filaments, both of whichlack a thick mucilage coat, arise in the mid-cortex. Carpogonial filaments are reflexed, the carpogonium and trichogynedifferentiating after final oblique division. The gonimoblast initials do not recurve around the auxiliary-cell filament, andthe cystocarps are distinctly cleft. Tetrasporophytes are unknown. The only unique feature of D. canariensis is the arrangement of its spermatangia in corymbose terminal and subterminal fascicles, a feature unreported in the few species ofDudresnaya where male gametophytes are known. However, D. canariensis differs from the other Dudresnaya species bya unique combination of significant attributes. It is postulated that the Australian D. capricornica and the Japanese D.kuroshioensis are the closest relatives of the new species. YR 1997 FD 1997 LK http://riull.ull.es/xmlui/handle/915/26928 UL http://riull.ull.es/xmlui/handle/915/26928 LA en DS Repositorio institucional de la Universidad de La Laguna RD 29-mar-2024