Distribution and habitat
T. legatus is most easily distinguished from T. rex and T. dux by differences in pilosity, sculpture and the shape of the petiole and postpetiole. T. rex is almost lacking pilosity on the mesosomal dorsum, while the whole dorsal surface is covered with long erect hairs in T. legatus and T. dux. The foveolation is weaker in T. rex, especially on the mesosoma where the foveae on the mesosoma are small with most interspaces equal or wider than their diameter. T. legatus can be most easily separated from T. dux by the shape of the petiole, which is much more robust in the former. In lateral view, the peduncle of the petiole is not clearly differentiated, with an abrupt anterior slope of the node. There is also a conspicuous antereoventral projection of the petiole in T. legatus which is absent in T. dux.
Tyrannomyrmex legatus has its sting extruded and it is comparable in length with T. dux. It is possible that a fully extruded sting could appear to be longer as in T. rex. The palp formula is 2,2 and each segment is rather short. The setae on the ventral margin of the mandibles are normal. There is no median seta on the anterior margin of the clypeus, but rather a series of evenly spaced setae along the entire margin.
- Alpert, G. D. (2013), "A new species of Tyrannomyrmex (Hymenoptera: Formicidae) from Sri Lanka", Zootaxa 3721 (3): 286–290, doi:10.11646/zootaxa.3721.3.5
- This article incorporates text from a scholarly publication published under a copyright license that allows anyone to reuse, revise, remix and redistribute the materials in any form for any purpose: Alpert, G. D. (2013), "A new species of Tyrannomyrmex (Hymenoptera: Formicidae) from Sri Lanka", Zootaxa 3721 (3): 286–290, doi:10.11646/zootaxa.3721.3.5 Please check the source for the exact licensing terms.