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- Title
Morphological and morphometric studies of the antennal sensilla from two populations of Atta robusta (Borgmeier 1939) (Hymenoptera: Formicidae).
- Authors
Euzébio, D. E.; Martins, G. F.; Fernandes-Salomão, T. M.
- Abstract
The ant Atta robusta is endemic to the "restinga" ecosystems where it has an important roie in the dynamics of seed dis-persal. Despite its importance, A. robusta is considered a threatened species. In this study we analyzed the antennal sensory organs of two different populations of A robusta (from the cities of Säo Mateus and Maricá in in Espirito Santo and Rio de Janeiro States, respectively) using a scanning electron microscope (SEM). SEM revealed different types of sensilla in the A. robusta antennae, i.e., curved and straight trichoid, basiconic, ampullacea and coeloconic, which were highly abundant found in the distal flagellomeres (F) compared with other antenna regions. There were differences in samples collected from two locations in terms of the sensilla number and length. The average numbers of straight and curved trichoid sensillae numbers were different in F9 and F8, respectively, while the average length of the curved trichoid sensilla was only different in F9. These variations in sensory organs between two populations of A. robusta may indicate an adaptation of this species to different environmental conditions. The number of straight trichoid sensilla was only significantly different in F9.
- Subjects
ESPIRITO Santo (Brazil : State); MORPHOMETRICS; HYMENOPTERA; LEAF-cutting ants; ECOSYSTEMS; SEED dispersal; SENSE organs
- Publication
Brazilian Journal of Biology, 2013, Vol 73, Issue 3, p663
- ISSN
1519-6984
- Publication type
Article