부산대학교 도서관

ABSTRACTThe morphologically diverse and widespread red algal genus Plocamiumhas recently emerged as a source of bioactive compounds with potential application in the pharmaceutical industry. However, species identification and the taxonomy of the group remains problematic. An initial contribution to the taxonomy of Plocamiumin South Africa was therefore carried out using combined morphological and molecular approaches and existing literature. Plocamium robertiaeis reinstated as a distinct species based on molecular and morphological evidence, while Plocamium raphelisianum, a species from Spain, is placed in synonymy with P. suhrii. Along the South African coast, individuals of P. suhriiwere genetically divergent in different bioregions and will require further investigation. Contrary to previous reports, we confirm the absence in South Africa of two Australasian species, P. microcladioidesand P. mertensii, which were previosuly misidentified. The latter species likely represents a new, undescribed species in South Africa. Two additional species were also identified based on DNA but require further morphological assessment. We now recognize P. robertiae, along with eight other named species, plus five additional taxa, with varying levels of taxonomic confidence, and exclude P. microcladioidesand P. mertensiifrom the South African flora. This study doubles the number of species recognized since the last biodiversity assessment of Plocamiumand expands the distributional range of P. suhrii. Although our findings contribute an initial assessment assisted by DNA data, a full understanding of the taxonomy of Plocamiumin South Africa is far from complete.