Conselho Nacional de Desenvolvimento Científico e Tecnológico; Microstigmus e Spilomena são pequenas vespas com tamanho variando de 3 a 5 mm de comprimento. Microstigmus tem distribuição restrita à região neotropical e Spilomena é cosmopolita. O presente trabalho teve como objetivo determinar o número e a morfologia dos cromossomos em diferentes espécies de Microstigmus e Spilomena bem como estabelecer as relaç...
Tetragonisca angustula and Tetragonisca fiebrigi have recently been listed as valid species. This study aimed to cytogenetically investigate both species, emphasizing the new registry of B chromosomes in the tribe Meliponini. We analyzed colonies of T. angustula and T. fiebrigi collected at Tangará da Serra, Mato Grosso, Brazil, through conventional Giemsa staining, C-banding, and base-specific fluorochrome sta...
The stingless bee Partamona helleri in southeast Brazil shows the regular chromosome number 2n = 34 and a variable number of up to four minute B1 or B2 chromosomes. Previous cytogenetic analyses have indicated morphological similarities between the B1 chromosome and chromosome segments in the regular karyotype. In this study, microdissection and chromosome painting were employed along with C banding, NOR bandin...