Lectotypification of Gymnogongrus ligulatus. An addendum to “Two novel species of Yonagunia (Halymeniales, Rhodophyta) were uncovered in the South of Madagascar during the Atimo-Vatae Expedition”

In the cited article, we proposed the new combination Yonagunia ligulata (Harvey ex Kützing) Manghisi, M. Morabito, De Clerck & Le Gall. In this note, we add the lectotypification of its basyonym, Gymnogongrus ligulatus Harvey ex Kützing.