Spatial patterns in the brood combs of Nannotrigona testaceicornis (Hymenoptera: Meliponinae): male clusters - Eterovic, A.; Cabral, Gisele de Carvalho Pinto; Oliveira, Alexandre Adalardo; Imperatriz-Fonseca, Vera Lucia; Santos Filho, Persio de Souza (Genetics and Molecular Research, 2009)