Aedeagus morphology as a discriminant marker in two closely related Cactophilic species of Drosophila (diptera; drosophilidae) in South America - Franco, Fernando F.; Prado, Pedro Roberto Rodrigues; Sene, Fábio de Melo; Costa, Luciano da Fontoura; Manfrin, Maura Helena (Anais da Academia Brasileira de Ciências, 2006)