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</o:shapelayout></xml><![endif]--></head><body lang=PT-BR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>And the vouchers are here in our Museum!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>André<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>De:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> heliconius-bounces@ucl.ac.uk [mailto:heliconius-bounces@ucl.ac.uk] <b>Em nome de </b>James Mallet<br><b>Enviada em:</b> quarta-feira, 15 de dezembro de 2010 14:44<br><b>Para:</b> heliconius@ucl.ac.uk<br><b>Assunto:</b> [HELICONIUS] Ithomiinae interspecific hybridization, something I didn't know about<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Arial","sans-serif"'>Vasconcellos-Neto, J. 1982. Interspecific hybridization in <i>Mechanitis</i> butterflies (Ithomiinae): a novel pathway for the breakdown of isolating mechanisms. Biotropica 14:288-294.</span> <o:p></o:p></p><p class=MsoNormal style='margin-left:36.0pt'><u><span style='font-family:"Arial","sans-serif";color:blue'><a href="http://www.jstor.org/stable/info/2388088">http://www.jstor.org/stable/info/2388088</a></span></u> <o:p></o:p></p><p class=MsoNormal style='margin-left:36.0pt'><span style='font-family:"Arial","sans-serif"'>A novel pathway is proposed to explain the occasional breakdown of prezygotic (chemical-courtship) isolating mechanisms in mimetic ithomiine butterflies (Mechanitis polymnia and M. lysimma) In dense dry-season populations, mixed groups of males have been observed to court a single female. She becomes receptive through recognition of the pheromone produced by the conspecific majority males, but may be mated by a transpecific minority male in the courting group, leading to accidental interspecific hybridization. All five interspecific matings observed in Sumare, Sao Paulo, Brazil, were between a female of the more-abundant species, M. polymnia casabranca, and a male of the less-abundant M. lysimnia lysimnia. The F1 hybrid can probably backcross to both parental types, as many recombinant phenotypes are represented in the 48 presumed hybrids known from six localities, among over 36,500 parental types sampled or marked during seven years. The small interspecific introgression may occasionally be important in the evolution of these mimetic butterflies.</span> <o:p></o:p></p><p class=MsoNormal>best, j<br><br><o:p></o:p></p><p><span style='font-family:"Arial","sans-serif"'>________________________________<br><br>James Mallet<br>UCL<br><a href="http://www.ucl.ac.uk/taxome/jim">www.ucl.ac.uk/taxome/jim</a></span> <o:p></o:p></p></div></body></html>