Gracilidris is a genus of dolichoderine ants with nocturnal behaviour; thought to have gone extinct 15-20 million years ago, they have been found in Paraguay, Brazil, and Argentina and were described in 2006.

[4] For the first time, it was recorded that the dolichoderine ant genus Gracilidris and its sole species, G. pombero were found in the Colombia Amazon basin.

[5] Additional research on the Colombian Amazon Basin was conducted by the Department of Caqueta in Colombia in regard to the distribution of the Gracilidris genus.

After the research was completed at these institutions, it was concluded that the Gracilidris pombero derived from open areas in the western foothills of the Colombian Amazon basin.

[6] Furthermore, another group of workers assessed Gracilidris specimens at a few sites in Paraguay, Argentina, and the central and northeastern regions of Brazil.

In this study, the researchers conducted records of the G. pombero species through the collection of many ground-dwelling ants near the South American savanna of Brazil.