This is the first record of nesting in the soil by the ant Camponotus sericeiventris (Guérin-Méneville, 1838), which has arboreal habit. The study was conducted in southeastern Brazil, in an ant colony located in a subterranean site. This study describes, for the first time, the ability of this arboreal species to vary its nesting site by the occupation of an unusual place in an urban environment; and this study demonstrates that this species is an interesting model for studies in urban (...) environments. (shrink)

Some neotropical social wasps which are associated with some vertebrates and other insects like ants, and these interactions are reported for decades, but little is known about the presence of these in the Caatinga and Atlantic Forest. This study describes the first association’s record between nests of Polybia rejecta (Fabricius) wasp and Azteca chartifex Forel ants in the transition area of the Atlantic Forest and Caatinga in Rio Grande do Norte. The observations were in a private forest in Monte Alegre, (...) from October 2009 to September 2014 through active search for colonies, use of ad libitum method, photography and collection of specimens with traceability. In the study area were found four active colonies and one abandoned of P. rejecta, all associated with nests of A. chartifex with approach of 20-30 cm. It was found that when the colony of P. rejecta was disturbed, they became aggressive towards the disturbance object, whereas the ants gathered in order to fend off a potential predators. These interactions appear to benefit wasps and ants, it is assumed that is possible that wasps attack ants’s predators, whereas the ants attack the wasps’s predators. This study corroborates the hypothesis that the association between the social wasps P. rejecta and A. chartifex ants is beneficial for both species, and probably the wasps are the most benefited, but also shows the non-exclusivity of this association for the biomes up then reported. (shrink)

Solenopsis saevissima fire ants were found foraging in a Felis catus carcass over tissues an secretions present in holes and mucosa. The ants built a dirt-made physical structure around the carcass, which prevented necrophagous flies from laying eggs or larvae in the body. These observations are relevant to increasing knowledge on the role of this ant genus in the decaying process of other animal corpses, including humans.