Notes on the systematics and biogeographical relationships of Antarctic and sub-Antarctic Rhodophyta with descriptions of four new genera and five new species

Max H. Hommersand 1 , Richard L. Moe 2 , Charles D. Amsler 3  and Suzanne Fredericq 4
  • 1 Department of Biology, University of North Carolina, Chapel Hill, NC 27599-3280, USA
  • 2 University and Jepson Herbaria, University of California, Berkeley, CA 94720-2465, USA
  • 3 Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294-1170, USA
  • 4 Department of Biology, University of Louisiana at Lafayette, Lafayette, LA 70504-2451, USA


The present study consolidates knowledge of Antarctic marine Rhodophyta, incorporating new observations from the Antarctic Peninsula. Descriptions of four new genera and five new species are included: Rhodokrambe laingioides (Delesseriaceae), Leniea lubrica, Austropugetia crassa, Varimenia macropustulosa R.L. Moe gens. et spp. nov., and Nereoginkgo populifolia R.L. Moe sp. nov. (Kallymeniaceae). The new combination Trematocarpusantarcticus (Hariot) Fredericq et R.L. Moe is proposed for Kallymenia antarctica Hariot (Sarcodiaceae). Phylogenetic relationships are suggested based primarily on unpublished molecular analyses of rbcL sequences provided by S.-M. Lin, S. Fredericq, P.W. Gabrielson, D.W. Freshwater and M. Volovsek. Habitat and environmental conditions are incorporated from the field studies of R.L. Moe and C.D. Amsler. A preliminary assessment is made of the biogeographic relationships between Antarctic red algae and those found in related temperate regions based on a summary of tectonic and climatic reconstructions of the Cenozoic Southern Ocean and the unpublished phylogenetic studies of Hommersand and his associates.

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Botanica Marina publishes high-quality contributions from all of the disciplines of marine botany at all levels of biological organisation from subcellular to ecosystem: chemistry and applications, genomics, physiology and ecology, phylogeny and biogeography. Research involving global or interdisciplinary interest is especially welcome as well as applied science papers dealing with emerging conceptual issues or developing technologies.