title: Karyotypic description of the stingless bee Oxytrigona cf. flaveola (Hymenoptera, Apidae, Meliponina) of a colony from Tangará da Serra, Mato Grosso State, Brazil.
abstract: The aim was to broaden knowledge on the cytogenetics of the subtribe Meliponina, by furnishing cytogenetic data as a contribution to the characterization of bees from the genus Oxytrigona. Individuals of the species Oxytrigona cf. flaveola, members of a colony from Tangará da Serra, Mato Grosso State, Brazil, were studied. The chromosome number was 2n = 34, distributed among four chromosomal morphologies, with the karyotype formula 8m+8sm+16st+2t. Size heteromorphism in the first metacentric pair, subsequently confirmed by sequential staining with fluorochrome (DA/DAPI/CMA(3) ), was apparent in all the examined individuals The nucleolar organizing regions (NORs) are possibly located in this metacentric chromosome pair. These data will contribute towards a better understanding of the genus Oxytrigona. Given that species in this group are threatened, the importance of their preservation and conservation can be shown in a sensible, concise fashion through studies such as this.
authors.affiliation: Departamento de Ciências Biológicas, Universidade do Estado de Mato Grosso, Tangará da Serra, MT Brazil.
authors.forename: Diones
authors.initials: D
authors.lastname: Krinski
authors.forename: Anderson
authors.initials: A
authors.lastname: Fernandes
authors.forename: Marla Piumbini
authors.initials: MP
authors.lastname: Rocha
authors.forename: Silvia das Graças
authors.initials: Sd
authors.lastname: Pompolo