First record of Undaria pinnatifida (Laminariales, Phaeophyceae) in beach-cast macroalgae from the southeastern coast of Buenos Aires province, Argentina

Undaria pinnatifida (Harvey) Suringar 1873 is a marine brown macroalga of the order Laminariales, native to northern Asia. This species has an invasive behaviour, currently present on several coasts worldwide, including Argentina. Along the coast of Mar del Plata (Buenos Aires province), sporophytes of U. pinnatifida have been found growing within the local harbour area, but no information is…