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Abstract
Schizymenia dubyi (Chauvin ex Duby) J. Agardh is a red alga of the order Nemastomatales that is native to Europe, Asia and Oceania. The first specimen of this seaweed from the Argentinian coast was collected in the Chapadmalal intertidal wave-cut platform (38°12′S, 57°40′W) in September 2008. Taxonomic identification of the species was made on the basis of vegetative and reproductive characters and confirmed by DNA sequence analysis of the rbcL gene. The S. dubyi samples collected in the field were represented by foliose gametophytes as well as crustose tetrasporophytes. The gametophytes were distributed in patches of c. 50% coverage of the analysed quadrants (n = 20). Gametophyte abundance was 3.1±2.5 (mean±SD) plants per quadrant (0.04 m2). All these were fertile females. Molecular results placed the specimens from Argentina within the S. dubyi clade, closely related to S. dubyi from Japan and France.
Acknowledgements
The work was partially supported by the project PICT 2007-01398 of the National Agency of Scientific and Technological Promotion. We would like to thank NM Chiaradia for his help during the sampling. We also thank the two anonymous reviewers for their kind and helpful suggestions and specially to Dr TM Murphy of the Central Veterinary Research Laboratory of County Kildare, Ireland, for correcting the final version of the manuscript.