1 23 Journal of Applied Phycology ISSN 0921-8971 Volume 24 Number 6 J Appl Phycol (2012) 24:1643-1653 DOI 10.1007/s10811-012-9828-y The Gracilariaceae Germplasm Bank of the University of São Paulo, Brazil—a DNA barcoding approach Emmanuelle S. Costa, Estela M. Plastino, Rosario Petti, Eurico C. Oliveira & Mariana C. Oliveira