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Sensilas sao estruturas sensoriais presentes nas antenas dos insetos e sao responsaveis pela higro- quimio-, termo- e mecanorrecepcao. No presente trabalho, as sensilas presentes nos tres flagelomeros (F) mais distais de Melipona scutellaris Latreille (Hymenopera: Apidae) coletadas em diferentes altitudes (200 e acima de 900m) foram avaliadas qualitativamente e quantitativamente. A identificacao, contagem e medicao das sensilas foram feitas a partir de imagens da superficie dorsal das antenas que foram obtidas com o auxilio de microscopio eletronico de varredura. Foram observadas as sensilas placoide, basiconica, celoconica, ampulacea, campaniforme e tricoide reta e curvada. Comparativamente, o grupo localizado a 200m de altitude possui sensilas tricoides retas em maior quantidade nos tres flagelomeros, enquanto que o grupo de altitudes acima de 900m apresentou maior quantidade de sensilas tricoides curvadas no F9, sendo as mesmas maiores para o F10. Essas diferencas foram discutidas em funcao da localizacao geografica dos diferentes grupos aqui estudados. Os resultados da investigacao da estrutura antenal de M. scutellaris contribuem para um melhor entendimento da biologia dessa especie. A Comparative Study of the Antennal Sensilla of Melipona scutellaris Latreille (Hymenoptera: Apidae) Workers From Different Altitudes Abstract. The sensilla are sensitive structures located in different insect parts including antennae. They are responsible for the hygro- chemo-, thermo- and mechanoreception. In the present work the antennal topography of two different populations of Melipona scutellaris Latreille (Hymenopera: Apidae) from different altitudes (200 and above 900m) were studied considering the last three distal antennal flagelomers (F). Images of the antennal surface were obtained with the aid of the scanning electron microscope (SEM). The SEM analysis showed that the sensilla placodea, basiconic, coeloconic, ampullacea, campaniform and trichodea are present in the dorsal surface of the M. scutellaris antennae. The number of sensilla trichodea of the straight subtype is greater in the last three flagelomers in individuals of 200m altitude, while individuals located above 900m altitude has a greater number of sensilla trichodea of the subtype curved in the F9 and they have greater length in individuals of 900m altitude only in the F10. These differences were discussed according to the geographic location of the different groups studied here. This work represents the first assessment to antennal structure of M. scutellaris and contributes to a better understanding of the biology of this species.

Estudo comparativo das sensilas antenais de operárias de Melipona scutellaris (Hymenoptera: Apidae) de diferentes altitudes