Zootaxa 341: 1–6 (2003) ISSN 1175-5326 (Print Edition) ZOOTAXA 341 Copyright © 2003 Magnolia Press ISSN 1175-5334 (Online Edition)

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Zootaxa 341: 1–6 (2003) ISSN 1175-5326 (Print Edition) ZOOTAXA 341 Copyright © 2003 Magnolia Press ISSN 1175-5334 (Online Edition)

Zootaxa 341: 1–6 (2003) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA 341 Copyright © 2003 Magnolia Press ISSN 1175-5334 (online edition) A new myrmicine ant genus from Malaysia with uncertain affinities (Hymenoptera: Formicidae) FERNANDO FERNÁNDEZ C. Profesor Asociado, Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Apartado 7495, Bogotá D.C., Colombia [email protected] Abstract The new myrmicine genus Tyrannomyrmex is described based on a solitary worker from Negri Sembilam, Malaysia. The principal traits of the ant are mandibles with two teeth, inner modified setae on the ventral margin of mandibles, and mesosoma devoid of any groove or suture. This new genus somewhat resembles the Adelomyrmex genus-group (particularly Baracidris from Africa) especially because of the modified setae; the structure is different, however (cylindric in Tyranno- myrmex, spatulate in Adelomyrmex genus-group) and the similarity may be a convergence. The antennal and clypeal configuration, as well as tooth number, distance the genus from the adelomyr- mecines. The genus is described from a single species, T. rex n. sp., from Malaysia. A discussion of the affinities with Adelomyrmex genus-group is presented. Key words: Ants, Formicidae, Malaysia, Tyrannomyrmex rex Introduction Although there have been advances in the systematics and phylogeny of some ant groups, we are still far from a complete understanding of the taxonomy and phylogeny of the ants (Brown, 2000). This is especially true for the subfamily Myrmicinae, for which there are no modern proposals for the internal classification of its component species. With a few exceptions, we do no know the limits or relationships of most of the proposed supraspe- cific taxa, thus unfortunately the genus described here cannot be placed reliably in a tribe or genus group. Although the taxon appears to share some attributes with the Ade- lomyrmex genus-group (Fernández, 2003), it does not seem to belong in the group. Accepted: 17 October 2003; published: 28 October 2003 1.

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