Morphometric differences in a single wing cell can discriminate Apis mellifera racial types Tiago Maurício Francoy, Pedro Roberto Rodrigues Prado, Lionel Segui Gonçalves, Luciano da Fontoura Costa and David De Jong Apidologie, 37 1 (2006) 91-97 Published online: 10 January 2006 DOI: 10.1051/apido:2005062