Systematic studies of the antarctic species of the phyllophoraceae (Gigartinales,Rhodophyta) based on rbcL sequence analysis |
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| Authors: | Fredericg Suzanne Ramírez Maria Eliana |
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| Affiliation: | (1) Department of Botany, Duke University, 27708-0338 Durham, NC, USA;(2) Seccíon Botanica, Museo Nacional de Historia Natural, Santiago, Chile;(3) Present address: Department of Botany, NHB-166, and Laboratory of Molecular Systematics, National Museum of Natural History, Smithsonian Institution, 20560 Washington, DC, USA |
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| Abstract: | The taxonomic placement of four antarctic species of the marine red algal family Phyllophoraceae (Gigartinales) is assessed within a preliminary molecular phylogeny of the family based on direct sequence analysis of the chloroplast gene rbcL. Parsimony analysis of rbcL sequences indicates that Gymnogongrus antarcticus and Gymnogongrus turquetii cluster in a clade consisting predominantly of southern hemisphere species currently placed in Gymnogongrus and Ahnfeltiopsis, whereas Phyllophora ahnfeltioides and Phyllophora antarctica cluster in a separate clade that is widely divergent from the northern hemisphere Phyllophora clade. Results from molecular and morphological data challenge the current taxonomic concept that type of life history is a phylogenetically valid criterion for recognition of genera in the Phyllophoraceae. |
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| Keywords: | antarctic seaweeds molecular systematics Phyllophoraceae rbcL Rhodophyta |
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