RT info:eu-repo/semantics/article T1 Systematic revision of the foliose Halymeniaceae (Halymeniales, Rhodophyta) from Europe, with the description of Halymenia ballesterosii sp. nov. from the Mediterranean Sea and Nesoia hommersandii from the Canary Islands A1 Afonso Carrillo, Julio A1 Rodríguez-Prieto, Conxi A1 De Clerck, Olivier A1 Huisman, John M. A1 Lin, Showe-Mei A2 BotánicaEcología y Fisiología Vegetal A2 Botánica Marina AB In the past, large, foliose and unbranched Halymenia-like plants from Europe were often identified as ‘Halymenia latifolia’,however recent taxonomic studies have shown that ‘H. latifolia’ was a catch-all name for at least three cryptic species:Neofolia rosea, Nesoia mediterranea, and the genuine H. latifolia, which has been transferred to the recently establishedgenus Nesoia. In this study, we further refine the taxonomy of European Halymeniaceae by examining new collections offoliose taxa from the Mediterranean Sea and Macaronesia. Analyses of rbcL gene sequences showed that unbranched folioseHalymeniaceae from Europe can be separated into five species, including three previously described species in Neofolia(N. rosea) and Nesoia (N. latifolia and N. mediterranea) and two new species belonging to Halymenia (H. ballesterosii sp.nov.) and Nesoia (N. hommersandii sp. nov.). Halymenia ballesterosii is the only known unbranched foliose species in thegenus from Europe and can be separated from morphologically similar species in Neofolia and Nesoia by protruding surfacecells, two-celled carpogonial branches, a basal nutritive cell cluster in the carpogonial branch ampullae, and secondaryconnecting filaments issued from basal cells of ampullar filaments. Nesoia hommersandii differs from N. latifolia by the lackof swollen arms in medullary stellate cells and cystocarps that slightly protrude above the thallus surface. We expect that thespecies diversity of foliose Halymeniaceae may increase when more foliose plants are collected and examined from differentlocations in Europe. YR 2020 FD 2020 LK http://riull.ull.es/xmlui/handle/915/26849 UL http://riull.ull.es/xmlui/handle/915/26849 LA en NO Rodríguez-Prieto, C., J. Afonso-Carrillo, O. De Clerck, J.M. Huisman & S.M. Lin. 2020. Systematic revision of the foliose Halymeniaceae (Halymeniales, Rhodophyta) from Europe, with the description of Halymenia ballesterosii sp. nov. from the Mediterranean Sea and Nesoia hommersandii from the Canary Islands. European Journal of Phycology 55: 454-466. DS Repositorio institucional de la Universidad de La Laguna RD 18-nov-2024