Neorubra decipiens gen. & comb. nov. and Phyllymenia lancifolia comb. nov. (Halymeniales, Rhodophyta) from South America

The taxonomy of Grateloupia sensu lato from South America is still to be fully resolved. Based on the phylogeny of the rbcL and female reproductive structures, we described a new genus, Neorubra, to contain two Peruvian species previously known as Grateloupia denticulata and Prionitis decipiens. Neorubra was characterised by having five-celled carpogonial branches and four-celled auxiliary-cell branches, fusion of carpogonia and hypogynous cells that formed the basal cell or third cell of the carpogonial branch, a markedly elongated auxiliary-cell fusion cell and pericarps that were well developed on the basal side. Based on the carpogonial and auxiliary-cell ampullae and the formation of secondary connecting filaments, we transferred Grateloupia lancifolia to the genus Phyllymenia.