%0 Journal Article %T The Spiral Organ Responsible for Producing Sound Signals, an Essential Taxonomic Character in the Phylogenetic Analysis of the Genus Hamadryas (Nymphalidae: Biblidinae): The Case of Hamadryas chloe chloe (Stoll) [1787] from South America %A Luis Ricardo Murillo-Hiller %J ISRN Zoology %D 2011 %I Hindawi Publishing Corporation %R 10.5402/2011/170829 %U http://dx.doi.org/10.5402/2011/170829