Leptanilloides biconstrictus species-group
- Leptanilloides atlanticus
- Leptanilloides biconstrictus
- Leptanilloides caracola
- Leptanilloides copalinga
- Leptanilloides erinys
- Leptanilloides femoralis
- Leptanilloides gracilis
- Leptanilloides improvisus
- Leptanilloides prometeus
- Leptanilloides sculpturatus
Species from the Leptanilloides biconstrictus share the following characters: promesonotal connection completely unfused and flexible; lateroclypeal tooth (called genal tooth in Brandão et al. 1999, Longino 2003 and Donoso et al. 2006) well-developed (although apparently lacking in L. caracola Donoso et al., 2006, a species known only by its holotype; because this criterion may be difficult to observe with a stereo microscope, even at high magnification, the absence of a lateroclypeal tooth in L. caracola should be confirmed in SEM); abdominal segment III (postpetiole) nearly as high as abdominal segment IV; and postpetiolar spiracle situated proximately to the anterior margin of the tergite.
Moreover, species from this group are generally smaller than species of the L. legionarius species-group.
Leptanilloides legionarius species-group
Species from the Leptanilloides legionarius species-group share the following characters: promesonotal connection at least partially fused; lateroclypeal tooth absent or reduced; postpetiole reduced and isolated; and postpetiolar spiracle shifted posteriad on anteromedian side of the tergite.