Genetic diversity and population structure of Trigona pagdeni Schwarz in Thailand Sirikul Thummajitsakul, Sirawut Klinbunga, Deborah Smith and Siriporn Sittipraneed Apidologie, 39 4 (2008) 446-455 Published online: 25 June 2008 DOI: 10.1051/apido:2008026