Journal
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
Volume 78, Issue 2, Pages 203-212Publisher
ACAD BRASILEIRA DE CIENCIAS
DOI: 10.1590/S0001-37652006000200002
Keywords
morphometric; curvature; Drosophila buzzatii cluster; aedeagus
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Drosophilo serido and D. antonietae are sibling species belonging to the Drosophila buzzatii cluster. Morphologically, they can only be discriminated by quantitative traits. In this paper we analyze the length and equalized average curvature of four regions of the aedeagus of D. antonietae and D. serido. Specimens of D. serido and D. antonietoe were classified correctly 96.74% of the time. Based only on the variable that most contributed to the discrimination of the groups (equalized average curvature of the arch IV of the aedeagus), we observed significant intraspecific morphological divergence in D. serido in relation to the D. antonietae, in agreement with other markers. The high morphological divergence in equalized average curvature of the arch IV of the aedeagus shows that this region evolved faster than others, since the divergence of the two species. The importance of the present study to the understanding of the genetic basis that controls the formation of the acdeagus, in the species of the Drosophila buzzatii cluster, is discussed.
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