In 2003, Fernández described a new genus and species, T. rex, from peninsular Malaysia based on a single specimen collected from leaf litter at Negri Sembilan, Pasoh Forest Reserve in 1994 [REF].
Fernández (2003) provisionally concluded that Tyrannomyrmex is a distinct and isolated myrmicine genus with possible affinities to either the Adelomyrmex-genus group or the tribe Solenopsidini [REF].