Although the revision of the New World Leptogenys species is still in diapers I have managed to separate over 60 species and most can be readily determined using several characters. One thing that has apparently caused confusion with the group's taxonomy are the ergatoid queens, common to this species. They generally do not even have ocelli so telling them apart from workers is problematic and this can lead to the recognition of separate species based on caste differences. The queens have a proportionately larger gaster than the worker, though the size difference is not outstanding, and additionally the queen petiolar node tends to be wider long in dorsal view. Workers usually have a petiolar node that is longer than wide. The queen mandibles are more robust and lighter colored than in the workers, sometimes appearing as ladles or spoons, and of a pale yellow color tint. How generalized the mandibular differences are is not clear as the number of specimens at hand is relatively small and it could be limited to a species group or two. The pictures below show these mandibular differences between a queen and a worker of an unknown species from the same nest.
      In the field they are not exactly the most common ant around, and when they are locally abundant, this is correlated to the abundance of oniscomorph isopods. The three field sites in Venezuela where I have found several nests during the day have in common an ungodly amount of these crustacea jumping and hopping all over the leaf litter.