Contribution to the knowledge of Gongolaria barbata (Sargassaceae, Fucales) from the Mediterranean: insights into infraspecific diversity Author Falace, Annalisa 0000-0002-9671-5283 Department of Life Sciences, University of Trieste - Trieste, Italy. falace@units.it Author Manfrin, Chiara 0000-0002-4979-8557 Department of Life Sciences, University of Trieste - Trieste, Italy. cmanfrin@units.it Author Furnari, Giovanni 0009-0005-6598-7920 Dept. of Biological, Geological and Environmental Sciences - University of Catania, Italy. furnari.giovanni41@gmail.com Author Burchio, Sara D’Ambros 0009-0008-8066-4881 Department of Life Sciences, University of Trieste - Trieste, Italy. ambrosburchio@phd.units.it Author Pallavicini, Alberto 0000-0001-7174-4603 Department of Life Sciences, University of Trieste - Trieste, Italy. pallavic@units.it Author Descourvieres, Emmanuelle 0009-0000-8092-2504 Department of Life Sciences, University of Trieste - Trieste, Italy. emmanuelle.descourvieres@phd.units.it Author Kaleb, Sara 0000-0002-8584-7280 Department of Life Sciences, University of Trieste - Trieste, Italy. skaleb@units.it Author Lokovšek, Ana 0000-0003-2927-6089 Marine Biology Station Piran, National Institute of Biology, Piran, Slovenia. ana.lokovsek@nib.si Author Grech, Daniele 0000-0002-4936-5997 IMC-International Marine Centre, Oristano, Italy. d.grech@fondazioneimc.it Author Alongi, Giuseppina 0000-0003-2604-6106 Dept. of Biological, Geological and Environmental Sciences - University of Catania, Italy. g.alongi@unict.it text Phytotaxa 2024 2024-01-26 635 3 191 205 https://phytotaxa.mapress.com/pt/article/download/phytotaxa.635.3.1/51486 journal article 10.11646/phytotaxa.635.3.1 1179-3163 10592170 Gongolaria barbata f. hoppei (C. Agardh) Falace, Alongi et Kaleb comb. nov . Basionym: Cystoseira hoppei “ hoppii ” C. Agardh, 1820: 59 , Species algarum……Volumen primum. Pars prima. pp. [i–iv], [1]–168. Lundae [Lund]: ex officina Berlingiana. Homotypic synonyms: Cystoseira barbata var. hoppei “ hoppii ” (C. Agardh) J. Agardh 1842: 51 , Algae maris Mediterranei et Adriatici, …… pp. [i]–x, 1–164. Parisiis [Paris]: Apud Fortin, Masson et Cie. Cystoseira barbata f. hoppei “ hoppii ” (C. Agardh) Woronichin 1908: 117 , Buryya vodorosli ( Phaeophyceae ) Chernago Morya [The brown algae of the Black Sea]. Botanicheskii Zhurnal (1–2): 19–46, 113–138, 11 figures, 2 tables. [in Russian with German summary]