Morphometry of the antenna, number and distribution of structures in sensory olfactive bees Euglossina and Meliponina (Hym: Apidae) / MORFOMETRIA DA ANTENA, NÚMERO E DISTRIBUIÇÃO DE ESTRUTURAS SENSORIAIS OLFATIVAS EM ABELHAS EUGLOSSINA E MELIPONINA (HYM: APIDAE)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Most part of the external sensory receptaclles known are located in the antennal flagellate: sensilla placodea (olfactory discs, D.O.), basiconica, trichodea (cerdas), coeloconica, ampullaceae and campaniformia. The Apidae bees have been studied on diverse aspects, the external morphology, among which has call the attention for its importance is the bee antennae. The study of the antennae and their sensory olfactive structures has been done more frequently in highly social bees, such as Apina and Meliponina. The purpose of the paper was to analyze comparatively, at microscopic level, the size and the form of the antenna, the number and the distribution of the olfactory antennal structures or sensilla placodea in Euglossina and Meliponina bees with different social standards It was antennae from 10 males of Melipona favosa orbignyi and of Scaptotrigona depilis, 10 males of Eufriesea violaceae and of Exaerete smaragdina and 2 males of Exaerete dentata, totaling 62 bees analyzed for each species studied. For segment was counted the absolute number of the olfactory discs, it was measured diverse morphometric characters and obtained the following values AT (total area of the segment) aE (area with D.O), a (area with D.O.) and it was calculated the indices D.O./AT and D.O/aE. It was the Euglossina bees have more D.O., related to absolute numbers than the Meliponina. Among the Meliponina, the males and the workers the M. favosa orbignyi 5 have more absolute number of D.O., and comparing sex, the males have more D.O. than the females. As for the characters A (width of the segment) D and E (length of the segment), the Euglossina male show more value when compared to the workers and males of the Meliponina. As for the area of the antennal segment, Euglossina males present a total area AT much bigger than Meliponina. Among all the species analyzed, Euglossina show an area with olfactive structure (aE) and an area without theses D.O. (a) with similar sizes; while Meliponina, aE >a. Among the Meliponina, S. depilis have more discs (D.O./AT) with more concentration on the segment (D.O./aE) among the males, theses values are bigger than the females. The worker, M. favosa orbignyi, show theses indices much bigger than the males, indicating more quantity of D.O. with more concentration in the segment. Among all Euglossina, the males of Eufriesea violaceae have more D.O. than E. dentata and E. smaragdina (both with lower values than the Meliponina). Hence S. depilis, despite its smaller size, have the bigger number of D.O. than the Euglossina, Eufriesea violaceae have bigger number D.O. than the Exaerete (which are considered big bees and bigger than Eufriesea violaceae)

ASSUNTO(S)

sensilla placodea zoologia aplicada antennal flagellate olfactory discs discos olfativos sensilla placodea flagelo antenal

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