Cytogenetic studies of five taxa of the tribe Attini (Formicidae: Myrmicinae)
2013
Barros, Luísa Antônia Campos | Mariano, Cléa dos Santos Ferreira | Pompolo, Silvia das Graças
Cytogenetic studies have been carried out on more than 750 ant taxa and are an important tool in evolutionary, taxonomic and phylogenetic studies. However, less than 10% of the species reported in the tribe Attini have been studied. The aim of the present study was to describe the chromosomes of five attine ants collected in Viçosa, Minas Gerais state, Brazil, at present unknown. The ant karyotypes reported are: Sericomyrmex sp. (2n = 50, 44m + 6sm, n = 25, 22m + 3sm); Trachymyrmex relictus (2n = 20m); Trachymyrmex sp. (2n = 22, 18m + 4sm); Apterostigma madidiense (n = 23, 7m + 10sm + 5st + 1a) and Apterostigma steigeri (2n = 22, 20m + 2sm). C-banding showed that heterochromatin was present in the centromeric region of all chromosomes of T. relictus . Future cytogenetic studies on members of the tribe Attini will provide important information to discuss chromosome evolution in this ant group.
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