“…So far, it has been known to be widely distributed in southern South America where it is relatively frequent along the western coast of the continent, ranging from the Argentinean Neuquén and Chilean Cautin Provinces to Tierra de Fuego and extending to the northern maritime Antarctic (Deception Island) and subantarctic South Georgia (Bell, 1974;Ochyra et al, 2008a,b). The species subsequently recurs on the Prince Edward Islands and Îles Crozet (Blockeel et al, 2008), Îles Kerguelen (Cardot, 1916) and Heard Island (Ellis et al, 2015b), as well as on the Île Amsterdam in the warm-south-temperate zone (Ellis et al, 2015a). The present discovery of B. pachydictyon on Tristan da Cunha fills an obvious gap in the range of this species and confirms its phytogeographical status as an amphiatlantic southtemperate species.…”